This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
Froments sign is seen - 
Select and explain. 
A. Ulnar nerve palsy, B. Median nerve palsy, C. Anterior interosseous nerve palsy, D. Radial nerve palsy
A: Ulnar nerve palsy
Answer: A: Ulnar nerve palsy 
Explanation: Ans. is 'a' i.e., Ulnar nerve palsy [Ref: BDC 5th/e Volume 1 p. 136}NERVESRELEVANT TESTSUlnar Nerve PalsyBook test (Froment sign)Card testEgawa's testMusician's NerveMedian Nerve PalsyPointing index fingerPen testBenediction testOschner clasp testApe thumbLabourer's NerveRadial Nerve PalsyWrist dropFinger drop