The population of India at the time of Christ was approximately

The socio-religious cause of population growth is:

The greatest biological problem faced by human beings is:

'Hum Do Hamare Do' slogan encourages:

$A$: Every sixth person in the world is an Indian.
$R$: Life expectancy depends upon average life span.

$Statement 1$: Over-population has become a serious problem in the developing countries.
$Statement 2$: It does not exhaust natural resources, causes unemployment and pollution.