This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
[{'content': 'Under the registration act of 1969 death is to be registered with in - \nSelect and explain. \nA. 7 days after bih, B. 20 days after bih, C. 14 days after bih, D. 21 days after bih', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .', 'role': 'assistant'}]