The population of India in the early $21$st century was approximately: (in $crore$)

According to the world population,every ...... person is an Indian.

$Statement \; 1$: Zero population growth should be achieved as early as possible to control human population.
$Statement \; 2$: This requires not two children per couple but a little more effort on reduction of this number.

What are the probable factors that contributed to the population explosion in India?

Which states in India have the highest and lowest population,respectively?

What is the main cause of population explosion in India?