Read the passage and answer the question :

"Perhaps the most unique features of the Harappan civilisation was the development of urban centres. They had citadel and the lower towns. One of the most distinctive features of Harapppan cities was the carefully planned drainage system. The roads intersected at right angles and were well planned."

In which century did the archaeological excavations begin at Harappa?

Twentieth Century

The correct answer is Option (3) → Twentieth Century

1921: M.S. Vats begins excavations at Harappa.

The systematic archaeological excavations at Harappa, as well as other Harappan sites, were initiated in the early 20th century. Sir John Marshall, who served as the Director-General of the Archaeological Survey of India, played a key role in these excavations.