Longest day in the Northern hemisphere is ________.
1). 21st March
2). 21st September
3). 21st June
4). 21st April
1. The total surface area of earth is :
2. Which of the following is a block mountain
3. Farakka Barrage was commissioned to :
4. Synclines and anticlines are the terms associated with:
5. Which river does not form a delta?
6. Spring tides occur when ______.
7. Dogri is primarily spoken in which State?
8. Telugu is the official language of _________.