The Harapan civilization was discovered in the year _____.

1921

The correct answer is Option 3- 1921
The Harapan civilization was discovered in the year 1921 by John Marshall.

The Indus Valley Civilization, also known as the Harappan Civilization, was one of the world's earliest urban civilizations. It flourished in the plains of the Indus River and its tributaries, primarily in what is now modern-day Pakistan and northwest India, from approximately 3300 BCE to 1300 BCE.