Which Harappan site in Gujarat has a large brick basin that is widely identified as a dockyard?

Explanation

1. 01

   Lothal, near the Gulf of Khambhat, has a brick basin connected by a channel to an old course of the Sabarmati, read as a dock for boats.

2. 02

   Beads and seals found there point to trade by sea, including with Mesopotamia.

3. 03

   Dholavira, Surkotada and Rangpur are also Harappan sites in Gujarat, which is what makes the options hard.