This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Peripheral Nerve Injury, Subject name: Orthopaedics
[{'content': 'Which of the following will not take place in a patient with ulnar nerve injury in arm? \nSelect and explain. \nA. Claw hand, B. Thumb adduction, C. Sensory loss over medial aspect of hand, D. Weakness of flexor carpi ulnaris', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ulnar nerve palsy Flexor carpi ulnaris will be paralysed; Sensory loss over medial aspect of hand (area supplied by ulnar nerve) Claw hand due to paralysis of intrinsic muscles of hand. Adductor pollicis is supplied by ulnar nerve hence in ulnar nerve palsy thumb adduction will not be seen.', 'role': 'assistant'}]