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: Medicine
[{'content': 'All of the following are seen in cervical syringomyelia except: \nSelect and explain. \nA. Burning sensation in hands, B. Hyperophy of abductor pollicis brevis, C. Plantar extensor, D. Absent biceps reflex', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. b. Hyperophy of abductor pollicis brevis', 'role': 'assistant'}]