<prompt> 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-Flexor carpi ulnarisAdductor pollicisExtensor pollicis longusOpponens pollicis  <response>: 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. 