According to which theory will be the human population out-run food supply
Altrusian theory
Malthusian theory
Eltons theory
Kalthusian theory
Secondary infertility is
Average ratio of men and women in human population is
The best solution to population problem in India is to
Per year growth in India's population according to $1991$ census is
When the $2 ^{nd}$ and the $3^{rd}$ dose of $DPT$ is given to a child?