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
Froment's sign is seen in? 
Select and explain. 
A. Ulnar nerve palsy, B. Median nerve palsy, C. Anterior interosseous nerve palsy, D. Radial nerve palsy
B: Median nerve palsy
Answer: B: Median nerve palsy 
Explanation: Froment's sign: is also known as Book holding test. It is seen in Carpal tunnel syndrome. Median nerve is compressed in Carpal tunnel. Patient cannot hold book, it is a test to conform Carpal tunnel syndrome. REF:BD Chaurasia 7th edition Page no: 130