In sample registration system independent survey is done at every: (A) 2 months, (B) 6 months, (C) 12 months, (D) 2 years
Answer is B. SRS is a dual record system initiated to provide reliable estimates of bih and death rates.It consists of a continuous enumeration of bihs and deaths by an enumerator and an independent survey every 6 months by an investigator-supervisor.Park 23e pg: 841