(A) Overseas trade was carried out at Lothal.

(R) Lothal was a port with a dockyard.

1. (R) contradicts (A)
2. (R) is the reason for (A)
3. (A) is true but (R) is false.
4. (A) and (R) are independent of each other.

(A) The lower town had the residential buildings where people lived and worked.

(R) The residential buildings were built on a high mound to protect them from floods.

1. (R) contradicts (A)
2. (R) is the reason for (A)
3. (A) is true but (R) is false.
4. (A) and (R) are independent of each other.

Name one important public building of Indus Valley Civilisation and its importance.

Give any two characteristic features of the citadel.