<prompt> Which of the following isare source of moality related data:Sample registration systemDeath ceificateCentral bihs deaths registration actAll of the above  <response>: Ans: d. All of the above The SRS is a dual-record system, consisting of continuous enumeration of bihs deaths by an enumerator an independent survey every 6 months by an investigator-supervisorSince the introduction of this system, more reliable information on bih death rates, age-specific feility moality rates, infant, under-five adult moality etc. have become available.The act came into force on 1 april 1970, The act provides for compulsory registration of bihs deaths throughout the countryThe time limit for registering the event of bihs that of deaths is 21 days uniformly allover India 