Which of the following developing countries has a high death rate?

In India,the population crossed the one billion mark in May $2000$. The probable reasons for this are a decline in:
$A.$ Maternal mortality rate $(MMR)$
$B.$ Infant mortality rate $(IMR)$
$C.$ Number of people in the reproductive age group
$D.$ Death rate

Which of the following is the most convincing reason for increased population growth in a country?

According to the $1991$ census,the minimum percent of population increase was in which state?

'Population explosion' being witnessed is mainly due to:

There is a continuous increase in the world's population growth rate. This is due to: