Which of the following is not a non-conventional source of energy ?

1. Nuclear energy
2. Tidal energy
3. Petroleum energy
4. Wind energy

Birth rate is technically termed as :

1. Population density
2. Natality
3. Carrying capacity
4. Mortality

What are the age restrictions for marriage by law for boys and girls in India?

1. 18 years, 21 years
2. 21 years, 19 years
3. 21 years, 18 years
4. 18 years, 17 years

Assertion. Population density is the number of individuals in an area of 100 square kilometers per year.

Reason. Population density gives us an idea of all the living organisms of different species in a particular area every year.

1. Both A and R are True
2. Both A and R are False
3. A is True and R is False.
4. A is False and R is True.