The correct answer is: A. boxer.
Vijender Singh Beniwal is an Indian professional boxer who competes in the super middleweight division. He is a former Olympic bronze medalist, world amateur champion, and two-time Commonwealth Games gold medalist. He is the first Indian male boxer to win a professional world title, having held the WBO Asia Pacific and Oriental super middleweight titles from 2010 to 2012, and the WBO super middleweight title from 2015 to 2017.
Option B is incorrect because Vijender Singh Beniwal is not a wrestler. He is a boxer.
Option C is incorrect because Vijender Singh Beniwal is not an athlete. He is a boxer.
Option D is incorrect because Vijender Singh Beniwal is not a cricketer. He is a boxer.