This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Rural & Urban Health Centres, Workers, Norms, Subject name: Social & Preventive Medicine
Population covered under one Community Development Block is: 
Select and explain. 
A. 10,000, B. 30,000, C. 50,000, D. 100,000
D: 100,000
Answer: D: 100,000 
Explanation: One Community Development Block (ICDS) comprises of: Rural/Urban areas: 100,000 population (100 villages). Tribal areas: 35,000 population (550 villages).