P. V. Sindhu and Saina Nehwal are the only two Indian athletes to win an Olympic medal in which sport?
P. V. Sindhu:  She is one of the two Indian badminton players to ever win an Olympic medal – other being Saina Nehwal. Saina Nehwal: Saina Nehwal (   ; born 17 March 1990) is an Indian professional badminton singles player.
i don't know