This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Pharmacology
[{'content': 'Drug of choice in drug induced parkinsonism is: \nSelect and explain. \nA. Levodopa, B. Benzhexol, C. Amantidine, D. Carbidopa', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (B) Benzhexol(Ref: KDT 8/e p460)Central anticholinergics like trihexy phenydyl (Benzhexol) are the only drugs effective in drug induced Parkinsonism.', 'role': 'assistant'}]