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': 'A patient of parkinsonism is managed with L-dopa. If Vit. B-complex is administered concurrently- \nSelect and explain. \nA. The action of L-dopa in brain will be potentiated, B. Decarboxylation of L-dopa in brain will be decreased, C. Side effects will be ameliorated, D. Decreased efficacy will result', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is \'d\' i.e., Decreased efficacy will result "Pyridoxine abolishes the therapeutic effect of levodopa by enhancing peripheral decarboxylation of levodopa".', 'role': 'assistant'}]