The correct answer is option 2, Javelin throw.

Neeraj Chopra is a well-known athlete who has achieved success in the field of sports. In particular, he has excelled in the sport of javelin throw.

Option 1, Hammer throw, is not the correct answer. Hammer throw is a different sport in which athletes throw a heavy metal ball attached to a wire or handle.

Option 3, Shot put throw, is also not the correct answer. Shot put is a sport where athletes throw a heavy spherical object called a shot.

Option 4, Discus throw, is also not the correct answer. Discus throw is a sport in which athletes throw a heavy disc-shaped object.

Therefore, the correct answer is option 2, Javelin throw, as Neeraj Chopra has achieved great success in this particular sport.