The correct answer is option 1: Virat Kohli.
The Rajiv Gandhi Khel Ratna is the highest sporting honor in India, awarded annually to honor outstanding achievements in sports. In 2018, Virat Kohli, the captain of the Indian cricket team, was the sole recipient of the Rajiv Gandhi Khel Ratna Award. He was recognized for his exceptional performances and leadership in cricket.
Option 2, which includes S. Mirabai Chanu along with Virat Kohli, is incorrect. Mirabai Chanu, a weightlifter, received the Rajiv Gandhi Khel Ratna Award in 2018.
Option 3, Neeraj Chopra, is also incorrect. Neeraj Chopra, an Indian javelin thrower, was awarded the Rajiv Gandhi Khel Ratna Award in 2018.
Option 4, which includes Hima Das along with Neeraj Chopra, is also incorrect. Hima Das, an Indian sprinter, was not a recipient of the Rajiv Gandhi Khel Ratna Award in 2018.
Therefore, the only correct answer is option 1: Virat Kohli.