World Population Day is
$11^{th} July$
$21^{st} September$
$7^{th} April$
$1^{st} July$
7th April $\rightarrow$ World Health Day, $21^{\text {st }}$ September – World Alzheimer's Day.
“In the absence of environmental resistance the population grows in geometrical ratio when the food is given in arithmetical ratio''. This is
The concept that “Population tends to increase geometrically while food supply increases arithmetically'' was put forward by
Cause of decline of population in $1927$ was
Which one of the following is the most widely used method of contraception by females in India?
The least densely populated state of India is
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