Growth and Development — MCQs

Growth and Development Indian Medical PG Practice Questions and MCQs

Question 241: A 6-year-old child presents with nocturnal enuresis (bed-wetting at night) but no daytime wetting. Investigations reveal a urine specific gravity of 1.020, with all other tests being normal. What is the most appropriate advice?

A. Reassurance
B. Referral to a child psychologist (Correct Answer)
C. Ultrasound abdomen
D. CT pelvis

Explanation: **Explanation:** The clinical presentation describes **Monosymptomatic Nocturnal Enuresis (MNE)** in a 6-year-old. Nocturnal enuresis is defined as involuntary voiding of urine during sleep at least twice a week in children aged 5 years or older. **Why Option B is Correct:** While the initial management of MNE often involves behavioral modifications (fluid restriction, bladder training, or alarm therapy), the NEET-PG context frequently tests the psychological impact and underlying stressors associated with persistent bed-wetting. In a 6-year-old with normal physical findings and a normal urine specific gravity (indicating the kidneys can concentrate urine effectively), the condition is often functional or related to developmental/psychological stressors. A **referral to a child psychologist** is appropriate to address potential emotional triggers, secondary gains, or the psychological distress caused by the condition itself. **Why Other Options are Incorrect:** * **Option A (Reassurance):** While reassurance is part of management, active intervention is usually indicated after age 5, especially if the family is distressed. * **Option C & D (Ultrasound/CT):** These are unnecessary. A urine specific gravity of 1.020 and normal urinalysis rule out Diabetes Insipidus, Chronic Kidney Disease, and Urinary Tract Infections. Imaging is reserved for "Non-monosymptomatic" cases (daytime symptoms, weak stream, or constipation) to rule out structural anomalies like Posterior Urethral Valves or neurogenic bladder. **High-Yield Clinical Pearls for NEET-PG:** * **Primary Enuresis:** Child has never been dry for >6 months (most common). * **Secondary Enuresis:** Bed-wetting recurs after a dry period of >6 months (often due to psychological stress or UTI). * **Pharmacotherapy:** **Desmopressin (DDAVP)** is the drug of choice for rapid relief; **Imipramine** is a second-line option but carries a risk of cardiotoxicity. * **Most Effective Long-term Treatment:** Enuresis/Bed-wetting Alarm (highest success rate and lowest relapse rate).

Question 242: The chromosomal karyotype in Patau syndrome is?

A. 47,+21
B. 46XX/47,+18
C. 45XX,der(14;21)
D. 47XX,+13 (Correct Answer)

Explanation: **Explanation:** **Patau Syndrome** is a severe genetic disorder caused by **Trisomy 13**. The correct karyotype is **47,XX,+13** (or 47,XY,+13), indicating an extra copy of chromosome 13. This occurs most commonly due to meiotic non-disjunction during gametogenesis. **Analysis of Options:** * **Option D (Correct):** 47,XX,+13 represents Trisomy 13. It is characterized by the "classic triad" of **Microphthalmia, Cleft lip/palate, and Polydactyly**. * **Option A:** 47,+21 is the karyotype for **Down Syndrome** (Trisomy 21), the most common autosomal trisomy. * **Option B:** 46XX/47,+18 represents **Mosaic Edwards Syndrome**. While +18 is Edwards syndrome, mosaicism occurs when only a percentage of cells carry the extra chromosome. * **Option C:** 45XX,der(14;21) represents a **Robertsonian Translocation**, a common cause of familial Down Syndrome, where the total chromosome count is 45 but genetic material is rearranged. **High-Yield Clinical Pearls for NEET-PG:** * **Patau Syndrome (Trisomy 13):** Look for midline defects (Holoprosencephaly), Scalp defects (Aplasia cutis congenita), and Rocker-bottom feet. * **Edwards Syndrome (Trisomy 18):** Look for Clenched fists (overlapping fingers), Micrognathia, and prominent occiput. * **Mnemonic for Trisomies:** * **P**atau: **P**uberty (Age 13) * **E**dwards: **E**lection (Age 18) * **D**own: **D**rinking (Age 21) * **Prognosis:** Both Trisomy 13 and 18 have a very poor prognosis, with most infants not surviving beyond the first year of life.

Question 243: An 8-week-old infant can do all of the following except?

A. Maintain head control (Correct Answer)
B. Lift its head up to the horizontal line in ventral suspension
C. Follow a red object up to 180 degrees
D. Display a social smile

Explanation: **Explanation:** The correct answer is **A (Maintain head control)**. In pediatric development, milestones follow a predictable cephalocaudal (head-to-toe) progression. Complete head control is typically achieved by **4 months** of age. At 8 weeks (2 months), an infant still exhibits significant head lag when pulled to sit, although they may attempt to lift the head momentarily. **Analysis of Options:** * **A. Maintain head control:** This is the "Except" because it is a 4-month milestone. At 2 months, the neck muscles are not yet strong enough to support the head steadily without assistance. * **B. Lift head to the horizontal line in ventral suspension:** This is a classic 2-month gross motor milestone. When held prone (ventral suspension), the infant can lift their head to the level of the trunk. By 3 months, they can lift the head *above* the horizontal line. * **C. Follow a red object up to 180 degrees:** This is a 2-month visual milestone. While a 1-month-old follows objects to the midline (90°), a 2-month-old tracks objects from one side to the other (180°). * **D. Display a social smile:** This is one of the most high-yield 2-month social milestones. It signifies the beginning of interpersonal interaction, distinguishing it from the reflexive "spontaneous" smiles seen in newborns. **High-Yield Clinical Pearls for NEET-PG:** * **Social Smile:** 2 months (Earliest sign of social development). * **Head Control:** 4 months (No head lag when pulled to sit). * **Ventral Suspension:** Head at the level of the trunk at 2 months; head above the trunk at 3 months. * **Red Ball Tracking:** 1 month (90°), 2 months (180°). * **Coos:** 2 months (Vowel sounds).

Question 244: Persistence of this milestone beyond what age is considered abnormal?

A. 3 months
B. 5 months (Correct Answer)
C. 7 months
D. 9 months

Explanation: ***5 months*** - The **palmar grasp reflex** normally disappears by **3-4 months** of age as voluntary motor control develops. - Persistence beyond **5 months** indicates abnormal neurological development and potential **cerebral palsy** or other motor disorders. *3 months* - At 3 months, the **palmar grasp reflex** is still considered **normal** and expected to be present. - Most primitive reflexes, including palmar grasp, begin to fade around this age but complete disappearance occurs later. *7 months* - By 7 months, persistence would be **significantly abnormal** and far beyond the normal timeframe. - This would indicate **severe developmental delay** or **neurological pathology** requiring immediate evaluation. *9 months* - Persistence at 9 months represents **profound developmental abnormality** well beyond normal limits. - At this age, infants should demonstrate **voluntary grasping** and **pincer grip** rather than primitive reflexes.

Question 245: At what age can a child identify their age, gender, and name, draw a circle, and build a tower of nine cubes?

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

Explanation: ### Explanation The correct answer is **3 years**. This question tests the integration of milestones across multiple domains: gross motor, fine motor, language, and personal-social development. **1. Why 3 years is correct:** At 3 years, a child reaches several high-yield developmental milestones: * **Fine Motor:** They can build a **tower of 9–10 cubes** (Age in years × 3 is a common rule of thumb for cube towers up to age 3). They can also **copy a circle**. * **Language/Cognitive:** The child can state their **full name, age, and gender**. Their vocabulary has expanded to about 900 words, and they speak in 3–4 word sentences. * **Gross Motor:** They can ride a tricycle and go upstairs using alternating feet. **2. Why other options are incorrect:** * **2 years:** A 2-year-old can build a tower of only 6 cubes, draw a vertical line (not a circle), and use 2-word phrases. They generally cannot identify their gender or age reliably. * **4 years:** By this age, fine motor skills have progressed to copying a **square** and a cross. They can build a tower of 10+ cubes and tell stories. * **5 years:** A 5-year-old can copy a **triangle**, tie shoelaces, and speak fluently. **3. NEET-PG High-Yield Clinical Pearls:** * **Cube Towers:** 15 months (2 cubes), 18 months (3 cubes), 2 years (6 cubes), 3 years (9 cubes). * **Figure Drawing (Sequential):** Circle (3y) → Cross (3.5y) → Square (4y) → Triangle (5y) → Diamond (6y). * **Tricycle:** Riding a tricycle is a classic "3-year-old" milestone often tested alongside the "circle" and "9-cube tower."

Question 246: Which of the following developmental milestones is typically NOT achieved by a 15-month-old child?

A. Walking with support
B. Transfers objects from one hand to another
C. Builds a tower of two cubes
D. Speaks three-word sentences (Correct Answer)

Explanation: **Explanation:** The development of a child follows a predictable sequence across four domains: gross motor, fine motor, language, and social. To answer this question, one must distinguish between milestones achieved by **15 months** versus those expected at **3 years (36 months)**. **Why Option D is correct:** **Speaks three-word sentences** is a milestone typically achieved at **3 years (36 months)**. At 15 months, a child is expected to speak only 1–2 words with meaning (jargon speech). By 18 months, they have a vocabulary of about 10 words, and by 2 years (24 months), they begin using simple two-word phrases (e.g., "want milk"). **Analysis of Incorrect Options:** * **A. Walking with support:** This is a **9–10 month** milestone. By 15 months, most children can walk independently (usually achieved by 12–13 months) and may even crawl upstairs. * **B. Transfers objects from one hand to another:** This is a fine motor milestone achieved at **6 months**. By 15 months, fine motor skills have progressed to a mature pincer grasp and the ability to use a spoon. * **C. Builds a tower of two cubes:** This is a classic **15-month** milestone. The "Tower of Cubes" progression is a high-yield NEET-PG topic: 2 cubes at 15m, 3 cubes at 18m, 6 cubes at 24m, and 9 cubes at 36m. **High-Yield Clinical Pearls for NEET-PG:** * **Rule of Three (Language):** At 3 years, a child speaks in 3-word sentences and can give their name, age, and gender. * **Handedness:** Preference for one hand before **18 months** is abnormal and may suggest early focal neurological deficit (e.g., hemiplegic cerebral palsy). * **Social Milestone:** At 15 months, the child demonstrates "intense curiosity" and "feeds self with a cup."

Question 247: What is the percentage chance of having an unaffected baby when both parents have achondroplasia?

A. 0%
B. 25% (Correct Answer)
C. 50%
D. 100%

Explanation: ### Explanation **1. Understanding the Correct Answer (B: 25%)** Achondroplasia is the most common cause of short-limb dwarfism and follows an **Autosomal Dominant (AD)** inheritance pattern. It is caused by a gain-of-function mutation in the **FGFR3 gene**. When both parents have achondroplasia, they are both heterozygous (**Aa**) for the trait. (Note: Homozygous individuals, **AA**, do not survive). According to the Mendelian Punnett square for a cross between two heterozygotes (Aa x Aa): * **25% AA:** Homozygous dominant (Lethal) * **50% Aa:** Heterozygous (Affected with achondroplasia) * **25% aa:** Homozygous recessive (**Unaffected/Normal stature**) Therefore, there is a **25% chance** of having a child with normal height. **2. Why Other Options are Incorrect** * **A (0%):** Incorrect because the parents are heterozygous; they both carry the recessive "normal" allele (**a**) which can combine to produce an unaffected child. * **C (50%):** This is the probability of having a child with achondroplasia who survives (heterozygous). * **D (100%):** This would only occur if both parents were homozygous recessive (aa), which contradicts the premise that they have achondroplasia. **3. NEET-PG Clinical Pearls & High-Yield Facts** * **Lethality:** The homozygous state (**AA**) is **lethal in utero** or in the early neonatal period due to severe respiratory insufficiency from a constricted thoracic cage. * **Advanced Paternal Age:** Over 80% of cases are due to *de novo* mutations, which are strongly associated with increased paternal age (>40 years). * **Radiological Signs:** Look for "trident hand," "bullet-shaped vertebrae," and narrowing of the interpedicular distance in the lumbar spine. * **Intelligence:** Children with achondroplasia typically have **normal intelligence** and a normal lifespan.

Question 248: Significant variations in the attainment of milestones across different developmental domains is called:

A. Delay
B. Dissociation (Correct Answer)
C. Dency
D. Disability

Explanation: ### Explanation **Correct Answer: B. Dissociation** **Understanding the Concept:** In developmental pediatrics, **Dissociation** refers to a significant difference in the rate of development between two or more developmental domains (Gross Motor, Fine Motor, Language, and Social/Adaptive). For example, a child might have normal social and language milestones but show a significant lag in gross motor skills. This is classically seen in conditions like **Cerebral Palsy** (motor delay with normal social skills) or **Early Autism** (language delay with normal motor skills). **Analysis of Incorrect Options:** * **A. Delay:** This refers to a lag in all developmental domains (Global Developmental Delay) or a lag in a specific domain without a significant gap compared to others. It implies the child is following the normal sequence but at a slower pace. * **C. Dency:** This is not a standard medical or developmental term; it is likely a distractor. * **D. Disability:** This is a broad term referring to a functional limitation or impairment (e.g., Intellectual Disability) resulting from a delay or disorder, rather than the pattern of milestone attainment itself. **High-Yield Clinical Pearls for NEET-PG:** * **Global Developmental Delay (GDD):** Defined as a significant delay (2 standard deviations below the mean) in **two or more** developmental domains. * **Developmental Deviancy:** This refers to attaining milestones out of the normal sequence (e.g., a child who crawls before sitting or speaks in sentences before pointing). * **Regression:** The loss of previously acquired milestones; always a "red flag" indicating neurodegenerative disorders (e.g., Rett Syndrome, SSPE). * **Most common cause of Dissociation (Motor < Language):** Cerebral Palsy. * **Most common cause of Dissociation (Language < Motor):** Hearing impairment or Autism Spectrum Disorder.

Question 249: Which syndrome is characterized by hemihypertrophy, where one half of the body is enlarged?

A. WAGR syndrome
B. Denys-Drash syndrome
C. Beckwith-Wiedemann syndrome (Correct Answer)
D. All of the above

Explanation: **Explanation:** The correct answer is **Beckwith-Wiedemann Syndrome (BWS)**. BWS is a classic overgrowth disorder caused by epigenetic or genetic alterations on chromosome 11p15. It is clinically characterized by the triad of **Macrosomia** (large birth weight), **Macroglossia** (large tongue), and **Omphalocele** (abdominal wall defects). **Hemihypertrophy** (asymmetric overgrowth of one or more regions of the body) is a hallmark feature and a major clinical criterion for diagnosis. **Analysis of Options:** * **Beckwith-Wiedemann Syndrome (C):** As mentioned, hemihypertrophy is a defining feature. These patients have a significantly increased risk of embryonal tumors, most notably **Wilms tumor** and hepatoblastoma. * **WAGR Syndrome (A):** This is a microdeletion syndrome (11p13) characterized by **W**ilms tumor, **A**niridia, **G**enitourinary anomalies, and **R**etardation (Intellectual disability). It does not typically present with hemihypertrophy. * **Denys-Drash Syndrome (B):** This syndrome consists of a triad of progressive renal disease (diffuse mesangial sclerosis), male pseudohermaphroditism, and Wilms tumor. Hemihypertrophy is not a component of this syndrome. * **Option D:** Incorrect, as only BWS is characterized by hemihypertrophy. **NEET-PG High-Yield Pearls:** 1. **Wilms Tumor Screening:** All children with isolated hemihypertrophy or BWS must undergo abdominal ultrasounds every 3 months until age 7-8 for early detection of Wilms tumor. 2. **Hypoglycemia:** Neonates with BWS often present with severe **hyperinsulinemic hypoglycemia** due to pancreatic islet cell hyperplasia. 3. **Ear Creases:** Look for characteristic linear pits/creases on the earlobes in BWS clinical vignettes.

Question 250: What is the normal weight of an infant at 1 year of age compared to their birth weight?

A. Doubled
B. Tripled (Correct Answer)
C. Quadrupled
D. Variable increase

Explanation: **Explanation:** The weight of an infant is one of the most sensitive indicators of health and nutritional status. In pediatrics, weight gain follows a predictable pattern during the first few years of life. **Why the correct answer (B) is right:** On average, a healthy term infant doubles their birth weight by **5 months** of age and **triples** it by **1 year (12 months)**. This rapid growth is driven by high metabolic demands and adequate caloric intake during the first year of life. For a standard Indian neonate weighing 3 kg at birth, the expected weight at one year is approximately 9–10 kg. **Why the incorrect options are wrong:** * **A. Doubled:** This occurs earlier, typically between 4 to 5 months of age. * **C. Quadrupled:** This milestone is reached at **2 years** of age. * **D. Variable increase:** While individual growth varies, standardized growth charts (WHO) provide specific milestones used to screen for "Failure to Thrive" or overnutrition. **High-Yield Clinical Pearls for NEET-PG:** * **Weight Milestones:** * 5 months: 2x Birth Weight * 1 year: 3x Birth Weight * 2 years: 4x Birth Weight * 3 years: 5x Birth Weight * 5 years: 6x Birth Weight * 7 years: 7x Birth Weight * 10 years: 10x Birth Weight * **Initial Weight Loss:** It is normal for a neonate to lose **5–10%** of their birth weight in the first week of life (due to excretion of excess extravascular fluid and low intake), which is typically regained by **day 10–14**. * **Daily Gain:** In the first 3 months, an infant gains approximately **25–30 g/day**.

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

Practice Questions

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

Practice Questions

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