This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Demography and family planning, Subject name: Social & Preventive Medicine
In family welfare programme, score of 1 is given to - 
Select and explain. 
A. Bih rate, B. Net reproduction rate, C. Achievement of goal, D. Total implementation of programme
B: Net reproduction rate
Answer: B: Net reproduction rate 
Explanation: 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. NRR is a demographic indicator. NRR of 1 is equivalent to attaining approximately the 2-child norm. If the NRR is less than 1, then the reproductive performance of the population is said to be below replacement level Ref : Park 25th edition Pgno : 540