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: Pharmacology
[{'content': 'Vitamin def encountered with isoniazid is \nSelect and explain. \nA. Vit A, B. Vit B9, C. Vit BB6, D. Vit B12', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pyridoxine deficiency is seen with high doses of isoniazedRef:Katzung 11th ed Pg: 825', 'role': 'assistant'}]