The NRR means?

Correct option is A

Sol. NRR (Net Reproduction Rate) refers to the average number of daughters a woman would bear during her lifetime, assuming current age-specific fertility and mortality rates. It helps in analyzing population replacement levels. An NRR of 1 indicates a stable population without growth or decline.
Explanation of each option:
· (a) Net Reproduction Rate – Correct. It is a key demographic indicator used in population studies.
· (b) National Reproductive Rate – This term is not used in demography and lacks technical accuracy.
· (c) National Respiratory Rate – This is a clinical health term used in patient monitoring, not related to NRR.
· (d) All of these – Incorrect, as only (a) is the valid expansion of NRR.