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
True about sample registration system are all except? 
Select and explain. 
A. It is same as census, B. It is dual record system, C. It provides reliable estimate of bih rate and death rate, D. Independent retrospective half - yearly
A: It is same as census
Answer: A: It is same as census 
Explanation: .