Yang responded to the pressure by firing 9.8 to snatch the gold with an Olympic record of 251.8.
Elavanil finished 16th while the more experienced Apurvi settled for the 36th place
Chaudhary did not get off to the best of starts and, with a score of 47.7, was placed eighth in the standings after the first five shots.
All the gold medallists from Saturday's action at the Tokyo Olympics.
World rapid champion Viswanathan Anand came up with a fine performance to be placed tied second in the blitz tournament of the Altibox Norway chess tournament, in Stavanger.