## Correct Answer: C. 42 This question tests knowledge of **Urban Primary Health Centre (UPHC) norms** as per Indian public health standards. The slum population is calculated as 30% of 70,00,000 = 21,00,000. According to the **Indian Public Health Standards (IPHS)** and Ministry of Health & Family Welfare guidelines, **one UPHC is required for every 50,000 population in urban slum areas**. This norm is stricter than the general urban population (1 UPHC per 1,00,000) because slums have higher disease burden, malnutrition, and limited access to healthcare. Therefore, required UPHCs = 21,00,000 ÷ 50,000 = **42 UPHCs**. This calculation directly aligns with Park's Textbook of Preventive and Social Medicine, which emphasizes differential norms for slum populations due to their vulnerability and higher health risks. The norm of 1:50,000 for slums reflects India's commitment to equity in primary healthcare delivery, particularly in metropolitan areas where slum populations face significant health disparities. ## Why the other options are wrong **A. 22** — This represents approximately half the correct answer and likely results from miscalculating the slum population (using 15% instead of 30%) or applying the wrong denominator (1 UPHC per 1,00,000 instead of 50,000). This is a common arithmetic trap where students either halve the population or use the general urban norm instead of the stricter slum-specific norm. **B. 52** — This overshoots the correct answer and likely arises from using an incorrect denominator such as 40,000 (21,00,000 ÷ 40,000 ≈ 52.5) or misremembering the slum norm. NBE may include this to trap students who confuse slum norms with rural norms or apply non-standard ratios. **D. 32** — This results from calculating 21,00,000 ÷ 65,000 or similar incorrect denominators, or from using 30% of the general urban norm (30% of 1,00,000 ≈ 30,000). This trap exploits confusion between population percentages and facility ratios. ## High-Yield Facts - **UPHC norm for slum populations: 1 UPHC per 50,000** (stricter than general urban 1:1,00,000) - **Slum population calculation: 30% of 70,00,000 = 21,00,000** - **Required UPHCs = 21,00,000 ÷ 50,000 = 42** (direct division formula) - **Indian Public Health Standards (IPHS)** mandate differential norms for slums due to higher disease burden and health inequity - **Slum-specific norms** reflect India's focus on vulnerable populations in urban areas under National Urban Health Mission (NUHM) ## Mnemonics **SLUM-50 Rule** **S**lum = **50,000** population per UPHC (vs. general urban 1,00,000). Remember: Slums need **double the density** of facilities. **PSM Facility Norms Quick Recall** **Rural PHC**: 1:10,000 | **Urban UPHC (general)**: 1:1,00,000 | **Urban UPHC (slum)**: 1:50,000. Slums always get **stricter ratios** (smaller denominator = more facilities). ## NBE Trap NBE pairs slum population with the general urban UPHC norm (1:1,00,000) to trap students who fail to recognize that slum areas have **stricter facility requirements** due to higher vulnerability. The distractor options (22, 32, 52) exploit arithmetic errors and norm confusion. ## Clinical Pearl In Indian metropolitan areas like Mumbai, Delhi, and Bangalore, slum populations (often 30–40% of city population) face 2–3× higher maternal mortality, malnutrition, and communicable disease burden. The 1:50,000 UPHC norm ensures that these vulnerable populations receive proportionally more primary care touchpoints, reducing out-of-pocket expenditure and improving health equity—a core principle of India's National Urban Health Mission. _Reference: Park's Textbook of Preventive and Social Medicine (23rd ed.), Chapter on Urban Health & IPHS; Ministry of Health & Family Welfare, Indian Public Health Standards (IPHS) 2012_
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