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 features of Parkinson's disease, except- \nSelect and explain. \nA. Resting tremors, B. Brady or hypokinesia, C. Rigidity, D. Preserved postural reflexes", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]