Answer : 3. "Kalibangan "
Explanation :

camel bones have been found at the Harappan site of Kalibangan. Kalibangan is one of the archaeological sites of the ancient Indus Valley Civilization, located in present-day Rajasthan, India. The discovery of camel bones at Kalibangan suggests that camels were present in the region during the Harappan period, and they might have been used for various purposes by the ancient inhabitants, such as transportation or trade.