Generally there was population growth rate increase in India, but in which of the following year there was decrease in population growth rate
$1921$
$1941$
$1951$
$1971$
$A$ : Every sixth person in the world is an Indian.
$R $: Life expectancy depends upon average life span
Scientificstudy of human population is called
Housing problems, health problems, pollution problems etc. are created by the
Lactational amenorrhoea, is a natural way of birth spacing. It is due to the high level of
Which of the following drug is progesterone antagonist and acts as an abortion drug?