Which muscle is highlighted below?

The correct answer will be option-D

Explanation:

Triceps also knew as triceps brachii is the large muscle present in the backside of the upper limb. The triceps is named because it is the muscle with three head with different origin joined at the elbow which allows the movement of the elbow.

The tricep muscle is the antagonist in action to the biceps and is innervated by the radial nerve.

In the given question, since the muscles are present in the back of the upper limb which is in the opposite direction of the biceps, therefore, the muscle is the tricep.

Thus, option-D is the correct answer.

i believe the answer would be 'd'.

hope this !