The correct option is D 1827
The discovery of the ruins of Harappa was first reported in 1827, but excavations were conducted later in 1872-73 by Alexander Cunningham, and in 1921-22 under Sir John Marshall. Indian archaeologists like R.D Banerjee and Rai Bahadur Daya Ram Sahni also played an important role in discovering the ruins of Mohenjo-daro and Harappa.