Family planning program was initiated in
$1941$
$1951$
$1961$
$1981$
Cause of decline of population in $1927$ was
The percentage ratio of natality over mortality is called
According to the population of world, India is placed at
Which of the following can be taken as the most convincing factor for indicating the rapid increase in population growth of a country?
Scientificstudy of human population is called