Depositional plains formed as a result of action of wind have irregular and undulating surface because of

1. new deposits made everyday.
2. existence of sand dunes and hallows.
3. existence of scrubs.
4. All of the above.

A piece of land reclaimed from the sea or lake:

1. Horst
2. Graben
3. Dyke
4. Polder

Which of the following pairs is incorrectly matched?

1. Structural Plains : Coromandel Plains
2. Wind Deposition Plains : Thar Desert
3. River Deposition Plains : Northern Plains (India)
4. Marine Deposition Plains : Western Coastal Plains (India)

Epeirogenic forces lead to the formation of Block Mountains. In this context which of the following are true?

1. Horst — block mountains with flattened summits.
2. Graben — basins separating block mountains.
3. Vosges — example of block mountains.
4. All of the above.