This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'Which of the following is the national level system that provides annual national as well as state-level reliable estimates of feility and moality? \nSelect and explain. \nA. Census, B. Adhoc Survey, C. Sample Registration System, D. Civil Registration System', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Since civil registration is deficient in India, a Sample Registration System (SRS) was staed in the mid-1960s to provide reliable estimates of bih and death rates at the national and state level. SRS now covers the entire country and is a major source of health information. Since the introduction of this system, more reliable information on bih and death rates, age-specific moality and feility rates, infant and adult moality, etc. have been available', 'role': 'assistant'}]