This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper Extremity, Subject name: Anatomy
A patient presents with hypothenar muscle wasting and loss of sensation of medial one and a half digits. Which nerve is involved? 
Select and explain. 
A. Ulnar nerve, B. Median nerve, C. Radial nerve, D. Musculocutaneous nerve
A: Ulnar nerve
Answer: A: Ulnar nerve 
Explanation: Ans. A Ulnar nerve# The shown course of nerve is of ulnar nerve# Please refer the image below