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': 'Drug of choice for drug induced parkinsonism? \nSelect and explain. \nA. Levodopa, B. Anticholinergic, C. Selegiline, D. Carbidopa', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans is \'b\' i.e., Anticholinergic "Central anticholinergics are the only drugs effective in drug induced parkinsonism." o They act by reducing unbalanced cholinergic activity in the striatum of parkinsonism patients. Generally, tremor is benifited more than rigidity; hypokinesia is affected the least (Levodopa resolves hypokinesia and rigidity first and later tremor). Trihexyphenidyl (benzhexol) is the most commonly used anticholinergic in parkinsonism.', 'role': 'assistant'}]