This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Health care of community & international health, Subject name: Social & Preventive Medicine
[{'content': 'As per IPHS norms, the proposed number of female health worker at sub-centre : \nSelect and explain. \nA. 1, B. 2, C. 3, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Subcentre Norms (IPHS) : Manpower Existing Proposed Health worker (female) 1 2 Health worker (male) 1 1 Voluntary worker 1(optional) 1(optional) 2/3 3/4 Ref: Park 25th edition Pgno : 963', 'role': 'assistant'}]