Nain was cremated at his native village in Gaurisar.
His one-and-a-half-year-old daughter lit the funeral pyre.
A large number of villagers, officials from CRPF, district administration, and police paid their homage.
Nain was one the five CRPF personnel killed in the pre- dawn militant attack on the paramilitary force's camp in Pulwama district of Jammu and Kashmir on Sunday.