This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
[{'content': 'CHC acts as a referral center for \nSelect and explain. \nA. 2 PHCs, B. 4 PHCs, C. 6 PHCs, D. 8 PHCs', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Community Health Centre (CHC)\n\nSecondary level of health care.\nLocated for population of 1,20,000 in plains.\nLocated for population of 80,000 in hilly areas.\nStaff at CHC : 46-52\nActs as referral unit for 4 PHCS.\nBed strength : 30', 'role': 'assistant'}]