During the medieval India, the trade and commerce was improved by Shershah Suri by ___:
1.Renovating the grand trunk road
2.Building up sarais for the travellers and merchants to stay at
3.Making the provincial governors and other officials responsible for the protection of merchants going through their territory
Choose the correct option from the codes given below:

Answer: [D] 1, 2 & 3

This question is a part of GKToday's Integrated IAS General Studies Module