Explanation:

Malini Parthasarathy (Option C), a distinguished Indian journalist and former editor of The Hindu newspaper, was honored with the prestigious Columbia Journalism School Alumni Award. This award recognizes outstanding achievements and contributions in the field of journalism by alumni of the institution. Nirmala Lakshman (A) is also a journalist, Nagarjuna Ravi (B) is not primarily known in this context, and Siddharth Varadarajan (D) is a prominent journalist, but Malini Parthasarathy was the specific recipient of this award.