Correct option is C
The answer is (c) Gymnastics.
Pommel horse, Roman rings, and vaulting table are all apparatuses used in gymnastics. Pommel horse is a padded rectangular or cylindrical form with two pommels on the top, which is used for swinging and balancing feats. Roman rings are two suspended rings that are used for swinging, hanging, and acrobatics. Vaulting table is a flat, large, and cushioned surface that is used for vaulting. These apparatuses are not used in any other sport, so the answer is (c).