Correct Answer: Daya Ram Sahni

Solution : The correct answer is Daya Ram Sahni.

The discovery of Harappa by Daya Ram Sahni in 1921 and the excavations conducted under the supervision of Sir John Marshal and Colonel Meke led to the discovery of the Indus Valley Civilisation. Mohenjo-daro, Ropar, and Alamgirpur also had advanced civilisations. During the Harappa excavations in what is now Pakistan, archaeologists John Marshall, Ernest Mackay, and Harold Hargreaves made the first discovery of the Indus Valley.