[1] He qualified to represent India at the 2024 Summer Paralympics at Paris and won the gold medal in the men's club throw F51 event.

He set an Asian record with his throw of 34.92 m.[2] Nain was born in Badana village, Rohtak, Haryana.

He was paralyzed below the waist after a diving accident on 2 June 2012 when he hit the rocks in a canal near his aunt's house.

[2] Nain took up para athletics in 2014, and was mentored in discus throw by Amit Kumar Saroha.

[1] That year he also received the Bhim Award, the highest sports honour presented by the state government of Haryana, India.