The correct option is C Dockyard
Lothal was one of the seaports in the Indus valley civilisation. It is located between the river Sabarmati and Bhogavo at Dholka taluka of the Ahmedabad district. The Gulf of Khambhat is also 18 km away from here. One unique feature of this city is its dockyard, found at the lower town's eastern part. The dockyard was large and had a proper mechanism to facilitate the ships during high tides.