The correct answer is Option C. The wing of a bat.
Explanation:
Homologous structure to the human forearm is the wing of a bat. The human forearm has the same internal structure to wing of a bat.
Forearm of both human and bat contains two bone named ulna and radius. It contains muscle like flexors and extensors which helps in the movement of forearm. Internally the structure is same but look different in appearance from outside.
