Highest and lowest population in India is in

The total national income is divided by the total population of the country, then it is known as

$A$ : Inability to conceive or produce children even after $2 \;years$ of unprotected sexual cohabitation is infertility.
$R$ : In vitro fertilization followed by transfer of embryo into the female genital tract is ‘Test Tube Baby’ programme

Average ratio of men and women in human population is

In India, human population is heavily weighed towards the younger age groups as a result of