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 are clinical features of myasthenia gravis,except - \nSelect and explain. \nA. Spontaneous remission, B. Absent deep tendon reflexes, C. Proximal muscle involvement, D. Worsen by exertion', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]