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': 'Which of the following enzyme metabolizes Nitrates to produce Nitric oxide (NO) \nSelect and explain. \nA. Alcohol dehydrogenase, B. Nitrate reductase, C. Aldehyde dehydrogenase, D. Phosphodiesterase - 5', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]