Correct option is A
Ropar, also known as Rupnagar, located in Punjab, was the first Harappan (Indus Valley Civilization) site to be excavated after India gained independence in 1947. It was excavated under the supervision of Y.D. Sharma in 1953. The site provided significant insights into the later stages of the Harappan civilization, including evidence of its decline and interactions with post-Harappan cultures. Ropar revealed a continuous sequence of human occupation from the Harappan period to the early historic period, making it a critical site for understanding the evolution of civilization in the northwestern Indian subcontinent.