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': 'Bed strength at CHC: \nSelect and explain. \nA. 6-Apr, B. 10, C. 30, D. 50', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Community Health Centre (CHC)\n\nSecondary level of health care.\nLocated for population of 1,20,000 in plains.\n\tLocated 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'}]