Growth and Development — MCQs

Growth and Development Indian Medical PG Practice Questions and MCQs

Question 131: What is a developmental milestone typically achieved by a 1.5-year-old child?

A. Build a tower of 6 blocks
B. Speak 10-25 meaningful words
C. Scribble spontaneously (Correct Answer)
D. Point to 3-4 body parts

Explanation: At 18 months (1.5 years) of age, a child undergoes significant refinement in fine motor skills and symbolic play. **Scribbling spontaneously** is a hallmark fine motor milestone for this age. While a 15-month-old may scribble after a demonstration (imitation), the 18-month-old initiates the action independently. **Analysis of Options:** * **A. Build a tower of 6 blocks:** This is a **2-year (24 months)** milestone. At 15 months, a child builds a tower of 2 blocks; at 18 months, they build a tower of 3–4 blocks. * **B. Speak 10-25 meaningful words:** This is typically seen at **21 months**. An 18-month-old usually has a vocabulary of about 10 words. By 2 years, they use 50+ words and 2-word phrases. * **C. Scribble spontaneously (Correct):** This is the classic fine motor milestone for **18 months**. It signifies the development of the palmar supinate grasp and the cognitive intent to create marks. * **D. Point to 3-4 body parts:** This is a **2-year (24 months)** language/cognitive milestone. An 18-month-old can typically point to only 1 body part. **High-Yield Clinical Pearls for NEET-PG:** * **Tower of Blocks Rule:** Age in years × 3 (e.g., 2 years = 6 blocks; 3 years = 9 blocks). *Exception: 18 months = 3-4 blocks.* * **Handedness:** Usually determined by **2–3 years**. If a child shows a strong hand preference before 18 months, suspect contralateral motor deficit (e.g., hemiplegic CP). * **Stairs:** 18 months = climbs stairs with one hand held; 2 years = climbs stairs two feet per step (independently).

Question 132: Which teeth are commonly involved in Turner's hypoplasia?

A. Molars
B. Mandibular incisors
C. Premolars (Correct Answer)
D. Canine

Explanation: **Explanation:** **Turner’s hypoplasia** (also known as Turner’s tooth) is a localized enamel defect in a permanent tooth caused by an environmental insult during its development. The most common cause is a **periapical inflammatory lesion** (infection) or trauma associated with the preceding deciduous (primary) tooth. 1. **Why Premolars are correct:** The permanent premolars develop directly beneath the roots of the deciduous molars. Since deciduous molars are the teeth most frequently affected by extensive dental caries and subsequent periapical infections, the inflammatory process easily spreads to the underlying developing permanent successor. This disrupts the ameloblasts (enamel-forming cells) of the **premolar**, leading to focal enamel hypoplasia or discoloration. 2. **Why other options are incorrect:** * **Mandibular incisors/Canines:** While these can be affected (usually due to trauma to the primary incisors), it is statistically less common than the inflammatory cause affecting premolars. * **Molars:** Permanent molars do not have deciduous predecessors; therefore, they cannot be affected by the specific mechanism of Turner’s hypoplasia involving a primary tooth infection. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site:** Permanent Maxillary Incisors (if the cause is trauma) or **Mandibular Premolars** (if the cause is infection). In general MCQ contexts, **Premolars** are the classic answer. * **Appearance:** Ranges from a simple white/yellow-brown spot to severe pitting and irregularity of the crown. * **Key Distinction:** Unlike fluorosis or molar-incisor hypomineralization (MIH), Turner’s hypoplasia is typically **asymmetrical** and involves only a single tooth (solitary).

Question 133: At the end of 1 year of age, the number of carpal bones seen in the skiagram of the hand is ___________?

A. Nil
B. 1
C. 2 (Correct Answer)
D. 3

Explanation: **Explanation:** The appearance of carpal bones on a skiagram (X-ray) is a reliable indicator of **skeletal maturity (bone age)** in pediatrics. At birth, no carpal bones are ossified; they appear sequentially in a predictable chronological order during childhood. **Why the correct answer (C) is right:** By the end of the **1st year (12 months)** of life, typically **two** carpal bones have ossified and become visible on an X-ray. These are the **Capitate** (the first to appear, usually at 2–3 months) and the **Hamate** (usually at 3–4 months). **Analysis of incorrect options:** * **A (Nil):** At birth, the wrist is entirely cartilaginous, and no carpal bones are visible. By 1 year, the Capitate and Hamate are already well-established. * **B (1):** Only one bone (Capitate) is visible by 3 months. By 12 months, the Hamate has almost always joined it. * **D (3):** The third carpal bone to ossify is the **Triquetral**, which typically appears at **3 years** of age. Therefore, seeing three bones would indicate an older child. **High-Yield Clinical Pearls for NEET-PG:** * **Order of Ossification:** A useful mnemonic is "Go **C**aptain **H**ook **T**ake **L**una **T**o **T**rap **T**he **S**pider" (Capitate, Hamate, Triquetral, Lunate, Trapezium, Trapezoid, Scaphoid, Pisiform). * **Formula for Carpal Bones:** A general rule of thumb for children is: **Number of carpal bones = Age in years + 1** (Valid up to 8 years). * **The Pisiform:** This is the last carpal bone to ossify, appearing around **9–12 years** (puberty). * **Bone Age Assessment:** In clinical practice, the **Greulich and Pyle atlas** (X-ray of the left hand and wrist) is the gold standard for comparing chronological age versus bone age to diagnose endocrine or growth disorders.

Question 134: Which is the best parameter for Severe Acute Malnutrition (SAM)?

A. Weight for height (Correct Answer)
B. Height for age
C. Weight for age
D. Mid-arm circumference

Explanation: **Explanation:** The diagnosis of **Severe Acute Malnutrition (SAM)** is based on the identification of "wasting," which reflects an acute loss of body mass relative to skeletal growth. **1. Why Weight-for-Height (W/H) is the Correct Answer:** Weight-for-height is the most sensitive indicator of **acute malnutrition (wasting)**. It measures current body mass relative to stature, independent of age. According to WHO criteria, SAM is diagnosed if the **W/H Z-score is < -3 SD** (or if there is visible severe wasting/nutritional edema). It is the "gold standard" because it identifies children who have lost weight rapidly due to recent illness or starvation. **2. Analysis of Incorrect Options:** * **Height-for-Age (B):** This is the indicator for **Stunting**. It reflects **chronic (long-term) malnutrition** or past nutritional insults. It does not indicate the current acute status. * **Weight-for-Age (C):** This is the indicator for **Underweight**. It is a composite measure that does not distinguish between acute wasting and chronic stunting. It is used primarily for routine growth monitoring (e.g., ICDS growth charts). * **Mid-Upper Arm Circumference (MUAC) (D):** While MUAC < 11.5 cm is a diagnostic criterion for SAM and is excellent for community screening, **Weight-for-Height** remains the more precise physiological parameter for defining the severity of acute malnutrition in a clinical setting. **Clinical Pearls for NEET-PG:** * **SAM Criteria (WHO):** 1. W/H < -3 SD, OR 2. MUAC < 11.5 cm, OR 3. Bilateral pitting edema (Kwashiorkor). * **Stunting:** Height-for-age < -2 SD. * **Wasting:** Weight-for-height < -2 SD. * **Waterlow’s Classification:** Uses Weight-for-Height to classify wasting and Height-for-Age for stunting.

Question 135: A boy can grasp a rattle and has recently learned to transfer objects from one hand to another. What developmental milestone can he likely achieve next?

A. Babble (Correct Answer)
B. Say 'mama' or 'dada'
C. Sit without support
D. Stand with support

Explanation: ### Explanation **Concept Breakdown:** The child in the question has mastered **transferring objects from one hand to another**, a milestone typically achieved at **6 months** of age. To answer this question, you must identify the milestone that occurs immediately after or around the same time as the 6-month mark. **Why Option A is Correct:** * **Babbling** (polysyllabic speech like "ba-ba-ba") typically begins at **6 months**. * Since the child is already transferring objects (6 months), babbling is the most developmentally appropriate "next" or concurrent milestone. **Analysis of Incorrect Options:** * **B. Say 'mama' or 'dada' (Specific):** This is a **10-month** milestone. While a child might say "mama/dada" non-specifically at 9 months, specific usage is much later than the current 6-month stage. * **C. Sit without support:** This is achieved at **8 months**. At 6 months, a child typically sits *with* support (tripod position). * **D. Stand with support:** This is a **9-month** milestone. **High-Yield NEET-PG Clinical Pearls:** * **Hand-to-hand transfer:** 6 months (requires disappearance of the Palmar Grasp reflex). * **Pincer Grasp:** Immature at 9 months; Mature at 12 months. * **Social Smile:** 2 months (the first social milestone). * **Stranger Anxiety:** 7–9 months. * **Rule of Thumb for Sitting:** 5 months (with support), 8 months (without support). **Summary Table for 6 Months:** * **Gross Motor:** Sits with support (Tripod). * **Fine Motor:** Transfers objects; reaches for objects (unidextrous reach). * **Language:** Monosyllables/Babbling. * **Social:** Recognizes parents; prefers mother.

Question 136: Which of the following is NOT a feature of Prader-Willi syndrome?

A. Congenital hypotonia
B. Obesity and hyperphagia
C. Mental retardation
D. Cafe-au-lait spots (Correct Answer)

Explanation: **Explanation:** Prader-Willi Syndrome (PWS) is a complex genetic disorder caused by the loss of function of genes in the **paternal** copy of the chromosome **15q11-q13** region (most commonly via microdeletion or maternal uniparental disomy). **Why Cafe-au-lait spots is the correct answer:** Cafe-au-lait spots are hyperpigmented skin lesions characteristic of **Neurofibromatosis Type 1 (NF1)**, McCune-Albright syndrome, or Fanconi anemia. They are **not** a feature of Prader-Willi syndrome. In fact, patients with PWS often exhibit **hypopigmentation** (fair skin and light-colored hair) compared to their family members due to the involvement of the *OCA2* gene located near the PWS critical region. **Analysis of incorrect options:** * **Congenital hypotonia:** This is a hallmark feature. Infants present as "floppy babies" with poor suckling reflex and feeding difficulties in the neonatal period. * **Obesity and hyperphagia:** Between ages 1 and 6, the initial feeding difficulty transitions into uncontrollable hunger (hyperphagia) and a lack of satiety, leading to early-onset morbid obesity if not strictly managed. * **Mental retardation:** Most children with PWS have mild to moderate intellectual disability along with behavioral issues like temper tantrums and skin picking. **High-Yield Clinical Pearls for NEET-PG:** * **Genetics:** Remember "P" for **P**rader-Willi = **P**aternal deletion. (Maternal deletion results in Angelman Syndrome). * **Clinical Triad:** Hypotonia, Hypogonadism (undescended testes/micropenis), and Hyperphagia. * **Physical Features:** Almond-shaped eyes, thin upper lip, and small hands/feet (acromicria). * **Diagnosis:** DNA methylation analysis is the preferred initial screening test.

Question 137: A 14-year-old boy with intellectual disability presents with a long face, large ears, micropenis, and large testes. Chromosome analysis is likely to demonstrate which of the following?

A. Trisomy 21
B. Trisomy 18
C. Trisomy 13
D. Fragile X syndrome (Correct Answer)

Explanation: **Explanation:** The clinical presentation of intellectual disability, a long face, large ears, and **macro-orchidism** (large testes) is the classic triad for **Fragile X Syndrome**. This is the most common cause of inherited intellectual disability and the second most common genetic cause after Down syndrome. 1. **Why Fragile X Syndrome is correct:** It is caused by an expansion of **CGG trinucleotide repeats** in the *FMR1* gene on the X chromosome. While the question mentions "micropenis," it is important to note that macro-orchidism is the hallmark physical finding (usually post-pubertal). Other features include a prominent jaw, high arched palate, and behavioral issues like ADHD or autism. 2. **Why other options are incorrect:** * **Trisomy 21 (Down Syndrome):** Characterized by upslanting palpebral fissures, flat nasal bridge, Simian crease, and Brushfield spots. It is not associated with macro-orchidism. * **Trisomy 18 (Edwards Syndrome):** Presents with micrognathia (small jaw), low-set ears, clenched fists with overlapping fingers, and rocker-bottom feet. * **Trisomy 13 (Patau Syndrome):** Presents with midline defects like cleft lip/palate, holoprosencephaly, polydactyly, and microphthalmia. **High-Yield Clinical Pearls for NEET-PG:** * **Genetics:** X-linked dominant inheritance with variable expressivity; shows **genetic anticipation**. * **Diagnosis:** Molecular analysis (PCR or Southern Blot) is the gold standard, not standard karyotyping. * **Cytogenetics:** Under folate-deficient culture conditions, the X chromosome shows a "fragile site" (break) at Xq27.3. * **Mitral Valve Prolapse (MVP):** A common cardiac association in these patients.

Question 138: A child begins to sit with support, is able to transfer objects from one hand to another, and speaks monosyllabic babbles at what age?

A. 3 months
B. 6 months (Correct Answer)
C. 9 months
D. 12 months

Explanation: This question tests the integration of milestones across three domains: Gross Motor, Fine Motor, and Language. ### **Explanation of the Correct Answer** At **6 months**, a child typically achieves the following milestones: * **Gross Motor:** Sits with support (propped on hands or with external assistance). * **Fine Motor:** Transfers objects from one hand to another (palmar grasp is well-developed). * **Language:** Begins monosyllabic babbling (e.g., "ba," "da," "ma"). * **Social:** Recognizes strangers (stranger anxiety begins around this time). ### **Analysis of Incorrect Options** * **3 months:** The child achieves **neck holding** (gross motor), follows objects 180° (fine motor), and produces **cooing** sounds (language). They cannot sit or transfer objects yet. * **9 months:** The child **sits without support**, crawls/creeps, and develops a **pincer grasp** (using thumb and index finger). Language progresses to **bisyllables** (e.g., "mama," "dada"). * **12 months:** The child **stands without support** or walks with one hand held. They can drop an object into a narrow neck container and speak **1-2 words with meaning**. ### **High-Yield Clinical Pearls for NEET-PG** * **Handedness:** Usually develops by **2-3 years**. If a child shows a strong hand preference before 18 months, it may indicate a neurological deficit in the contralateral limb. * **Social Smile:** Appears at **2 months** (a very high-yield milestone). * **Object Permanence:** Develops around **9 months** (the child looks for a hidden toy). * **Mirror Play:** A 6-month-old enjoys looking at themselves in a mirror and smiles at the image.

Question 139: A child is able to say sentences of 6 words. What is the likely age of this child?

A. 2 years
B. 3 years
C. 4 years (Correct Answer)
D. 5 years

Explanation: ### Explanation The development of language is a critical milestone in pediatric growth. A child’s ability to form sentences is directly proportional to their age in years, following a predictable clinical "rule of thumb." **1. Why 4 years is correct:** The most reliable clinical pearl for language development is that **the number of words in a child's typical sentence equals their age in years.** * At **4 years**, a child can typically construct sentences of **4 to 6 words**. * Additionally, at this age, their speech should be 100% intelligible to strangers, and they begin to use past tense and tell simple stories. **2. Analysis of Incorrect Options:** * **2 years:** A 2-year-old typically uses **2-word phrases** (e.g., "Want milk," "Go out"). Their vocabulary is roughly 50–200 words, and speech is about 50% intelligible to strangers. * **3 years:** A 3-year-old uses **3-word sentences** (Subject-Verb-Object, e.g., "I want cookie"). Speech is 75% intelligible, and they can state their name, age, and gender. * **5 years:** A 5-year-old uses complex sentences of **5 to 6+ words**. They can define simple words, use future tense, and identify coins/colors. **3. NEET-PG High-Yield Clinical Pearls:** * **Intelligibility Rule:** 2 years = 50% intelligible; 3 years = 75% intelligible; 4 years = 100% intelligible. * **Vocabulary Milestones:** * 1 year: 1–3 words. * 18 months: 10–20 words. * 2 years: 50–200 words. * **Red Flag:** If a child does not have single words by 15 months or 2-word phrases by 2 years, a formal hearing and developmental assessment are required.

Question 140: A 15-year-old male child with a mental age of 9 years has an IQ of?

A. 50
B. 60 (Correct Answer)
C. 70
D. 80

Explanation: ### Explanation **1. Understanding the Correct Answer (B):** The Intelligence Quotient (IQ) is a measure of intellectual performance relative to age. It is calculated using the classic formula: **IQ = (Mental Age / Chronological Age) × 100** In this clinical scenario: * **Mental Age (MA):** 9 years * **Chronological Age (CA):** 15 years * **Calculation:** (9 ÷ 15) × 100 = 0.6 × 100 = **60**. An IQ of 60 falls into the category of **Mild Intellectual Disability** (IQ range 50–70). These individuals are often "educable" and can achieve social and vocational adequacy with proper support. **2. Analysis of Incorrect Options:** * **Option A (50):** This would require a mental age of 7.5 years (7.5/15 × 100). * **Option C (70):** This would require a mental age of 10.5 years (10.5/15 × 100). * **Option D (80):** This would require a mental age of 12 years (12/15 × 100), falling into the "Low Average" or "Dull Normal" category. **3. Clinical Pearls & High-Yield Facts for NEET-PG:** * **Classification of Intellectual Disability (WHO/ICD-10):** * **Mild:** IQ 50–70 (Educable; 85% of cases). * **Moderate:** IQ 35–49 (Trainable; can perform supervised tasks). * **Severe:** IQ 20–34 (Can be taught basic self-care). * **Profound:** IQ < 20 (Total dependence). * **Developmental Quotient (DQ):** For younger children, DQ is used instead of IQ, calculated as (Developmental Age / Chronological Age) × 100. * **Most Common Genetic Cause:** Down Syndrome is the most common genetic cause of intellectual disability, while **Fragile X Syndrome** is the most common *inherited* cause. * **Normal IQ:** 90–109 is considered average.

Practice by Chapter

Normal Growth Parameters

Practice Questions

Developmental Milestones

Practice Questions

Puberty and Adolescent Development

Practice Questions

Growth Disorders

Practice Questions

Failure to Thrive

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Developmental Screening and Assessment

Practice Questions

Developmental Delays

Practice Questions

Growth Charts and Monitoring

Practice Questions

Short Stature

Practice Questions

Tall Stature

Practice Questions

Precocious and Delayed Puberty

Practice Questions

Psychosocial Development

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