Which of the following statements about the population pyramid of India is incorrect?
Child protection scheme is under which ministry?
What does the net reproduction rate indicate?
Which agency monitors air quality in India?
In which of the following diseases is mass vaccination considered ineffective?
What are the serogroups covered by the bivalent meningococcal vaccine?
Which method is primarily used to assess HIV prevalence?
What is the most common cancer diagnosed in men?
Which is the main vector of Dengue?
Which is the least common cause among these of infant mortality in India?
NEET-PG 2012 - Community Medicine NEET-PG Practice Questions and MCQs
Question 11: Which of the following statements about the population pyramid of India is incorrect?
- A. India has narrow apex
- B. Developing countries have bulge in the center
- C. India has narrow base (Correct Answer)
- D. India has broad base
Explanation: ***Correct Answer: India has narrow base*** - A **narrow base** in a population pyramid indicates a **low birth rate** and a small proportion of young people. - This statement is **INCORRECT for India**, as India's population pyramid has a **broad base** due to high birth rates and a large proportion of children and young people. - This is the correct answer because the question asks for the incorrect statement. *Incorrect Option: India has narrow apex* - A **narrow apex** signifies a **smaller proportion of older individuals**, indicating lower life expectancy. - This is TRUE for India's population pyramid, making it an incorrect answer choice. *Incorrect Option: Developing countries have bulge in the center* - A **bulge in the center** represents a larger cohort of working-age adults in developing countries undergoing demographic transition. - This reflects improvements in childhood survival and declining (but still substantial) birth rates. - This is TRUE, making it an incorrect answer choice. *Incorrect Option: India has broad base* - A **broad base** indicates a **high birth rate** and large proportion of young children in the population. - This is TRUE and characteristic of India's population structure, making it an incorrect answer choice.
Question 12: Child protection scheme is under which ministry?
- A. Ministry of Social Justice and Empowerment
- B. Ministry of Health and Family Welfare
- C. Ministry of Education
- D. Ministry of Women and Child Development (Correct Answer)
Explanation: ***Ministry of Women and Child Development*** - The **Ministry of Women and Child Development** is the nodal ministry in India responsible for formulating and administering laws, policies, and programs concerning women and children, including child protection schemes. - This ministry works to ensure the overall development, welfare, and protection of children, addressing issues such as child abuse, exploitation, and trafficking through various initiatives. *Ministry of Health and Family Welfare* - This ministry primarily deals with **public health**, healthcare services, and family planning, focusing on the health and nutritional aspects of children, but not their overall protection and welfare schemes. - While it contributes to child well-being through health programs, it does not oversee the comprehensive **child protection framework**. *Ministry of Social Justice and Empowerment* - This ministry focuses on the welfare, social justice, and empowerment of **marginalized and vulnerable sections** of society, including persons with disabilities, scheduled castes, and other backward classes. - While it addresses social welfare, its primary mandate is not specific to the overall **child protection scheme**, which falls under a dedicated ministry. *Ministry of Education* - The Ministry of Education is responsible for the **educational system**, including primary, secondary, and higher education. - While it promotes children's development through education, it does not have the mandate for the broader **child protection schemes** that address safety, welfare, and legal aspects beyond schooling.
Question 13: What does the net reproduction rate indicate?
- A. Number of live births per 1000 mid-year population
- B. Number of live births per 1000 women of child bearing age
- C. Average number of daughters a newborn girl will have during her lifetime (Correct Answer)
- D. None of the options
Explanation: ***Average number of daughters a newborn girl will have during her lifetime*** - The **net reproduction rate (NRR)** specifically measures the average number of **daughters** a newborn girl is expected to have throughout her reproductive years, taking into account **mortality** rates. - An NRR of 1 indicates that each generation of women is exactly replacing itself, while an NRR greater or less than 1 suggests population growth or decline, respectively. - This is the **correct definition** of NRR and focuses on female offspring as they are the ones who will contribute to the next generation. *Number of live births per 1000 mid-year population* - This describes the **crude birth rate (CBR)**, which is a general measure of fertility but does not account for the age and sex structure of the population or mortality rates. - It includes all live births in relation to the total population, not specifically focusing on the generational replacement of females. *Number of live births per 1000 women of child bearing age* - This definition refers to the **general fertility rate (GFR)**, which is a more refined measure of fertility than the crude birth rate, as it focuses on women in their reproductive years (typically 15-49 years). - However, it still does not track the replacement of daughters who will become mothers, nor does it factor in mortality within the female population. *None of the options* - This option is incorrect because one of the given options accurately defines the net reproduction rate. - The net reproduction rate is a well-established demographic indicator used in population studies and public health planning.
Question 14: Which agency monitors air quality in India?
- A. None of the above
- B. Central pollution control board (Correct Answer)
- C. Central air quality board
- D. Central public works dept
Explanation: ***Central pollution control board*** - The **Central Pollution Control Board (CPCB)** is responsible for setting standards and monitoring air quality across India. - It works under the **Ministry of Environment, Forest and Climate Change (MoEFCC)**. *Central air quality board* - There is **no specific agency** or board named "Central Air Quality Board" in India. - Air quality monitoring falls under the broader mandate of pollution control. *Central public works dept* - The **Central Public Works Department (CPWD)** is primarily involved in the construction and maintenance of government buildings and infrastructure. - It does **not have a mandate** for environmental monitoring like air quality. *None of the options* - This option is incorrect because the **Central Pollution Control Board** is the correct agency responsible for air quality monitoring. - There is a specific statutory organization fulfilling this role.
Question 15: In which of the following diseases is mass vaccination considered ineffective?
- A. Tetanus (Correct Answer)
- B. None of the options
- C. Measles
- D. Polio
Explanation: ***Correct: Tetanus*** - Mass vaccination is considered **ineffective** for tetanus because it is **not a communicable disease** transmitted person-to-person - Tetanus is caused by **Clostridium tetani** spores present in soil and environment - Since there is **no herd immunity** benefit, vaccinating large populations simultaneously does not break any chain of transmission - **Individual immunization** with tetanus toxoid is highly effective for personal protection, but this is different from mass vaccination strategies used for communicable diseases - The focus for tetanus prevention is on **universal immunization** and **wound management**, not mass campaigns *Incorrect: Measles* - Mass vaccination for measles is **highly effective** due to its person-to-person transmission - Achieving high vaccination coverage (>95%) provides **herd immunity** and can lead to **elimination** - The **MMR vaccine** is a cornerstone of mass immunization programs worldwide *Incorrect: Polio* - Mass vaccination campaigns (Pulse Polio) have been **extremely effective** in nearly eradicating polio globally - The disease spreads through the fecal-oral route, making mass vaccination crucial for breaking transmission chains - Both **OPV** and **IPV** provide individual and community protection through herd immunity *Incorrect: None of the options* - This is incorrect because tetanus is a clear example where mass vaccination strategy is ineffective due to lack of person-to-person transmission
Question 16: What are the serogroups covered by the bivalent meningococcal vaccine?
- A. Serogroup A
- B. Serogroup A and C (Correct Answer)
- C. Serogroup W
- D. Serogroup C
Explanation: ***Serogroup A and C*** - The **bivalent meningococcal vaccine** specifically targets and provides protection against **Neisseria meningitidis** serogroups **A and C**. - This vaccine is crucial for preventing invasive meningococcal disease caused by these prevalent strains, particularly in the African meningitis belt. - Examples include **meningococcal AC conjugate vaccines** used in mass vaccination campaigns. *Serogroup A* - While **Serogroup A** is one of the types covered by bivalent vaccines, it is not the only one. - A vaccine covering only Serogroup A would be a **monovalent vaccine**, not bivalent. *Serogroup W* - **Serogroup W** is covered by **quadrivalent meningococcal vaccines** (e.g., MenACWY) which protect against serogroups A, C, W, and Y. - It is **not included** in **bivalent** formulations. *Serogroup C* - While **Serogroup C** is one of the types covered by bivalent vaccines, it is not the only one. - A vaccine covering only Serogroup C would be a **monovalent vaccine**, not bivalent.
Question 17: Which method is primarily used to assess HIV prevalence?
- A. Sentinel surveillance in high-risk populations (Correct Answer)
- B. Passive surveillance through reporting systems
- C. Disease registries for HIV patients
- D. Active case finding through outreach programs
Explanation: ***Sentinel surveillance in high-risk populations*** - **Sentinel surveillance** focuses on specific, well-defined groups, such as pregnant women or individuals attending STD clinics, to get a representative estimate of **HIV prevalence** in the broader community. - This method is particularly effective for diseases that are difficult to track through general population surveys due to stigma or low overall prevalence. *Passive surveillance through reporting systems* - **Passive surveillance** relies on healthcare providers voluntarily reporting cases, which often leads to **underreporting** and an incomplete picture of an epidemic's true scope. - It primarily captures known cases rather than estimating the overall **prevalence** within a population. *Disease registries for HIV patients* - **Disease registries** are valuable for tracking the natural history, treatment outcomes, and long-term trends among *diagnosed* individuals, but they do not capture undiagnosed cases, thus not accurately representing **prevalence**. - They provide data on incidence (new cases) and patient management but are less suited for estimating the total number of people living with the disease at a given time. *Active case finding through outreach programs* - **Active case finding** aims to identify new cases within specific communities, usually in response to an outbreak or in populations with known high risk. - While it identifies undiagnosed individuals, its primary goal is case identification and linkage to care, rather than providing a **statistically representative prevalence** estimate for an entire population.
Question 18: What is the most common cancer diagnosed in men?
- A. Bladder cancer
- B. Colorectal cancer
- C. Oral cancer (Correct Answer)
- D. Prostate cancer
Explanation: ***Oral cancer*** - **Oral cancer** is the most common cancer diagnosed in men in India, particularly cancers of the **lip, oral cavity, and oropharynx**. - India accounts for approximately **one-third of the global burden** of oral cancers. - Major risk factors include **tobacco chewing (gutka, pan masala, betel quid), smoking, and alcohol consumption**. - Early detection through **oral examination** and avoiding tobacco products are key preventive measures. *Prostate cancer* - While prostate cancer is the most common cancer in men in **Western populations**, it ranks **much lower in India** (typically 3rd-5th most common). - Incidence is increasing in urban Indian populations due to improved detection and lifestyle changes. *Bladder cancer* - **Bladder cancer** is significant but less common than oral cancer in Indian men. - Risk factors include **smoking** and occupational exposure to chemicals. *Colorectal cancer* - **Colorectal cancer** is increasing in incidence in India but remains less common than oral cancer in men. - Screening with **colonoscopy** is recommended for early detection, especially in those with family history.
Question 19: Which is the main vector of Dengue?
- A. A. aegypti (Correct Answer)
- B. Culex
- C. Anopheles
- D. Aedes scutellaris
Explanation: ***A. aegypti*** - **Aedes aegypti** is the primary vector responsible for transmitting the **Dengue virus** to humans. - It is a **day-biting mosquito** found predominantly in tropical and subtropical regions. *Culex* - **Culex mosquitoes** are known vectors for diseases like **Japanese encephalitis**, **West Nile virus**, and **filariasis**. - They are generally **night-biting** and do not play a significant role in Dengue transmission. *Anopheles* - **Anopheles mosquitoes** are the primary vectors for **malaria** in humans. - They are not associated with the transmission of the Dengue virus. *Aedes scutellaris* - While part of the **Aedes genus**, **Aedes scutellaris** is a secondary vector for Dengue in the **Pacific region**. - The main vector for Dengue globally remains **Aedes aegypti**, followed by **Aedes albopictus** in some regions.
Question 20: Which is the least common cause among these of infant mortality in India?
- A. Infections
- B. Birth injuries (Correct Answer)
- C. Congenital malformations
- D. Prematurity
Explanation: ***Birth injuries*** - While significant in some contexts, **birth injuries** are a less common cause of infant mortality in India compared to other factors like infections, prematurity, and congenital malformations. - Progress in **obstetric care** and improvements in delivery practices have helped reduce their incidence as a primary cause of death. *Infections* - **Infections**, particularly **neonatal sepsis**, pneumonia, and diarrhea, remain a leading cause of infant mortality in India. - Poor sanitation, lack of access to clean water, and inadequate vaccination coverage contribute significantly to their prevalence. *Congenital malformations* - **Congenital malformations** (birth defects) are a substantial cause of infant mortality in India, particularly those affecting the heart, brain, and neural tube. - Early detection and intervention for these conditions are often limited, increasing their impact on mortality rates. *Prematurity* - **Prematurity** (being born too early) and its associated complications, such as respiratory distress syndrome and low birth weight, are major contributors to infant mortality in India. - Many premature infants struggle with underdeveloped organs and systems, making them highly vulnerable in the first few weeks of life.