Concept:Krishna Nagar is an Indian para-badminton player.He won the gold medal at the 2020 Tokyo Paralympics.Explanation:Krishna Nagar belongs to Rajasthan.He competed in the men's singles SH6 category in para-badminton.He was ranked world number 2 in this category.At the 2020 Summer Paralympics, he won a gold medal.This was India's 19th medal and its fifth gold at the Tokyo Games.Answer:The correct option is A. Badminton.