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: Surgery
In a patient with history of trauma and X-ray showing fracture of proximal pa of medial bone of forearm with dislocation. The muscles which may get paralysed- 
Select and explain. 
A. Flexor carpi ulnaris, B. Adductor pollicis, C. Extensor pollicis longus, D. Opponens pollicis
C: Extensor pollicis longus
Answer: C: Extensor pollicis longus 
Explanation: Answer- C. Extensor pollicis longus Fracture of proximal pa of medial bone of forearm (ulna) with dislocation is Monteggia fracture-dislocation.Most common nerve which may be injured in Monteggia fracture-dislocation is posterior interosseus nerve (PIN).