This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'Drugs causing pyridoxine deficiency are the following except \nSelect and explain. \nA. Hydralazine, B. Griseofulvin, C. Cycloserine, D. Penicillamine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]