Answer : 2. "Lothal "
Explanation :

Lothal is close to Saragwala village that’s in Ahmedabad district. In between 1955 and 1962, it was excavated in the direction of S.R. Rao, where the remain of a town two miles inhabited received. It was divided in 6 parts. The ruins of Defence ramparts, roads and houses and elevated platforms were found here. Here the most valuable achievement was a large size cardoon (214×3 cm) which was made up of pared brick. Rao said this ‘the ships dock’. Hence lothal was a port city. It was situated on the banks of bhoguva river. Two different mounds are not found in Lothal. The entire along was surrounded by a single wall.