This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy, Subject name: Pharmacology
Prolonged treatment with INH leads to deficiency of 
Select and explain. 
A. Pyridoxine, B. Thiamine, C. Pantothneic acid, D. Niacin
A: Pyridoxine
Answer: A: Pyridoxine 
Explanation: Refer Katzung 11/e p825 Isoniazid can cause peripheral neuropathy It is due to deficiency of Pyridoxine