Which muscle is innervated by the ulnar nerve? select from letters a-d?

The ulnar nerves innervate muscles in the frontal part of the forearm, and in the hand. In the anterior forearm, the well-developed branch of ulnar nerve provisions two muscles: Flexor carpi ulnaris which stretches and abducts the hand at the wrist; and Flexor digitorum profundus which stretches the fingers.