Verified answer

Answer:

c) Both (i) & (ii)

Explanation:

Lothal :

Lothal is the only port-town of the Indus Valley Civilisation. A metropolis with an upper and a lower town had in on its northern side a basin with vertical wall, inlet and outlet channels which has been identified as a tidal dockyard.

Rupar :

Ropar is an Indus Valley settlement located on the banks of the Sutlej River. Recent excavations at Ropar(Rupnagar) have demonstrated that this town was the centre of a well developed Indus Valley Civilization. Ropar is the location of the earliest Indus Valley excavations in independent India.

So option c) is correct