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': 'National Family Health Survey has successfully completed \nSelect and explain. \nA. One rounds, B. Two rounds, C. Three rounds, D. Four rounds', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Is a large-scale, multi-round survey conducted in a representative sample of households throughout India\n3 rounds of the survey have been conducted till 2006:\nNFHS–1: 1992–93\nNFHS–2: 1998–99\nNFHS–3: 2005–06', 'role': 'assistant'}]