The correct options are
A Illiteracy
B Poverty
D Need for a male child.
The following are the reasons for population explosion in India:
1. Illiteracy :The ignorance and superstitious belief of people make them not realise the problem of population explosion.
2. Poverty : The impoverished require more people working in the family, so they give birth to more children.
3. Mortality rate :Due to high infant mortality rate, people give birth to more children to increase the chance of some of them surviving.
4. Need for a male child: People believe male children are boon to a family. Couples keep trying until they have a male baby. So the number of children in their family will keep increasing.