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: Anatomy
Paralysis of which of the following muscle causes froment's sign? 
Select and explain. 
A. Opponen's pollicis, B. Abductor pollicis, C. Adductor pollicis, D. Adductor hallucis longus
C: Adductor pollicis
Answer: C: Adductor pollicis 
Explanation: Pen test - Median NerveCard test - Ulnar Nerve Egawas test - Ulnar Nerve Froment's sign - Ulnar N.