70. Which of the following initiatives was/were taken by Sher Shah Suri to promote trade and commerce ?
1. Introduction of gold, silver and copper coins of uniform standard.
2. Restoration of the Grand Trunk Road.
3. Simplified the custom duty structure.

Select the correct answer using the code given below :

1. Only 1

2. Only 2

3. Only 1 and 2

4. 1, 2 and 3

Correct Answer :

1, 2 and 3