<prompt> Registration of bih death with a 6 monthly survey is done in ?National sample surveyVital statistical systemCensusSample registration system  <response>: Ans. is d i.e., Sample registration system Sample registration system Sample registration system SRS, initiated in mid 1960s provides reliable estimates of bih feility and death moality rates at state and national levels. It is a dual record system,consisting of continuous enumeration of bih and death by an enumerator and an independent survey every 6 months by an investigator supervisor. Main objective of SRS is to provide reliable estimates of bih rate, death rate and infant moality rate at the natural division level for rural areas and at state level for urban areas. Infant moality rate is the decisive indicator for estimation of sample size at natural division. Sample design for SRS is unistage stratified simple random sample. SRS now covers entire country. Finding of recent SRS 2013, According to 23rde of Park :- i Crude Bih Rate CBR : 21.6 per 1000 mid-year population. ii Crude Death Rate CDR : 7.0 per 1000 mid-year population. iii Natural Growth Rate : 14.5 per 1000 mid-year population. iv Infant Moality Rate IMR : 42 per 1000 live bihs. 