Sample registration system is -

Ans. is 'a' i.e., Dual record systemSample registration systemo Sample registration system (SRS), initiated in mid 1960s provides reliable estimates of birth (fertility) and death (mortality) rates at state and national levels.o It is a dual record system,consisting of continuous enumeration of birth and death by an enumerator and an independent survey every 6 months by an investigator supervisoro Main objective of SRS is to provide reliable estimates of birth rate, death rate and infant mortality rate at the natural division level for rural areas and at state level for urban areas,o Infant mortality rate is the decisive indicator for estimation of sample size at natural division.o Sample design for SRS is unistage stratified simple random sample. SRS now covers entire countryo Finding of recent SRS (2013)i) Crude Birth 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 Mortality Rate (IMR): 42 per 1000 live births.