The correct answer is: B. Wrestler.
Bahadur Singh was an Indian wrestler who won gold medals in the 1978 and 1982 Asian Games. He was born in 1952 in the village of Jhajjar in Haryana, India. He started wrestling at the age of 12 and won his first national championship in 1973. He represented India at the 1976 Summer Olympics in Montreal, where he finished fifth. He won his first Asian Games gold medal in 1978 in Bangkok, Thailand. He won his second Asian Games gold medal in 1982 in New Delhi, India. He retired from wrestling in 1984.
Option A: Shot putter is incorrect because Bahadur Singh was a wrestler, not a shot putter.
Option B: Wrestler is correct because Bahadur Singh was an Indian wrestler who won gold medals in the 1978 and 1982 Asian Games.
Option C: Runner is incorrect because Bahadur Singh was a wrestler, not a runner.
Option D: Boxer is incorrect because Bahadur Singh was a wrestler, not a boxer.