Answer : 2. "Harappa"
Explanation :

The first city discovered in India was Harappa.

• It was excavated in 1921 in the Punjab province of British India.

• With Harappa as the first site to be excavated, the Indus Valley Civilization is hereafter also known as the Harappan Civilization.

• It was excavated by Daya Ram Sahni in 1921.

• It is situated on the banks of river Ravi.