This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb, Subject name: Anatomy
In forearm ulnar nerve gives muscular branch to which muscle ? 
Select and explain. 
A. Flexor digitorium profundus, B. Palmaris brevis, C. Gastronemius, D. Adductor pollicis
A: Flexor digitorium profundus
Answer: A: Flexor digitorium profundus 
Explanation: In arm ulnar nerve has no supply, it supplies the muscles in the forearm and in hand. It also gives cutaneous branches and vascular /aicular branches.in the forearm, it supplies medial half of flexor digitorum profundus, flexor carpi ulnaris. BD Chaurasia 7th edition Page no: 182 Figure:13.12,page no:179- vishram singh- textbook of upper limb& thorax- 2nd edition.