WORLD CIVILIZATION

Detailed explanation-1: -Rai Bahadur Daya Ram Sahni CIE (16 December 1879 – 7 March 1939) was an Indian archaeologist who supervised the excavation of the Indus valley site at Harappa in 1920 to 1921 But the first report of Harappan excavations came out in 1921, 29 March by John Marshall .

Detailed explanation-2: -Mohenjo-daro was discovered in 1922 by R. D. Banerji, an officer of the Archaeological Survey of India, two years after major excavations had begun at Harappa, some 590 km to the north.

Detailed explanation-3: -Notes: At the time of excavation of Harappan site, the Director General of Archaeological Survey of India was John Marshall (1902-28). In 1921, he focused on the Indus Valley, which led to the discovery of the ancient Indus Valley Civilization, the ancient cities Harappa and Mohenjo-Daro.