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: Pharmacology
[{'content': "Drugs used for the treatment of Parkinson's disease include:– \nSelect and explain. \nA. Levodopa, B. Bromocriptine, C. Benserazide, D. All of these", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Levodopa, bromocriptine and benserazide are used in Parkinsonism.\nMazindol is a potent anorectic agent. It has an additional peripheral effect of increasing metabolic rate.\nAcyclovir is an antiviral agent, not used in parkinsonism.', 'role': 'assistant'}]