This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Social & Preventive Medicine
[{'content': 'To achieve a Net Reproduction Rate (NRR) of 1,the Couple Protection Rate (CPR) should be:(2018) \nSelect and explain. \nA. 20%, B. 30%, C. 40%, D. 60%', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Net Reproduction Rate (NRR):- Net Reproduction Rate (NRR) is defined as the number of daughters a newborn girl will bear during her lifetime assuming fixed age-specific feility and moality rates (21) . NRR is a demographic indicator. NRR of 1 is equivalent to attaining approximately the 2-child norm. TheNational Health Policy was approved by the Parliament in 1983. It laid down the long- term demographic goal of NRR= 1 by the year 2000 - which implies a 2-child family norm - through the attainment of a bih rate of 21 and a death rate of 9 per thousand population, and a couple protection rate-of 60 per cent by the year 2000. Ref:- park ; pg num:-540, 569', 'role': 'assistant'}]