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
Most significant indicator of feility is 
Select and explain. 
A. Net reproductive rate, B. Family size, C. Gross reproductive rate, D. General feility rate
A: Net reproductive rate
Answer: A: Net reproductive rate 
Explanation: Net reproductive rate is defined as the number of daughters a newborn girl will bear during her life time assuming fixed age specific feility and moality rates It is a demographic indicator NRR of 1 is equivalent to attaining approximately the 2 child norm If NRR < 1, then the reproductive performance of the population is said to below replacement level Reference : Park&;s textbook of preventive and social medicine, 23rd edition, Page no: 489