This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nerve supply, Nerve Lesions, Subject name: Anatomy
Ulnar injury in the arm leads to all EXCEPT:- 
Select and explain. 
A. Sensory loss of the medial 1/3rd of the hand, B. Weakness of the hypothenar muscles, C. Claw hand, D. Adduction of thumb
D: Adduction of thumb
Answer: D: Adduction of thumb 
Explanation: Ulnar nerve supplies the adductor pollicis muscle and hence it will be paralysed in its lesion. -hypothenar muscles are supplid by ulnar nerve -Ulnar nerve Palsy leads to Claw hand deformity Hence, adduction of thumb is not a clinical finding in ulnar nerve palsy.