The best solution to population problem in India is to
Conserve natural resources
Increase medical facilities
Reduce the birth rate
Increase food production
According to $2001 \;census$, Indian population was:
For determination of sex, body cells are taken from
The natural growth rate of population is checked by certain factors. These are known as
In India the number of females per thousands males had been constantly decreasing but in which of the following years, the number had been increased
Who was the first scientist to estimate the human population