This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: JIPMER 2019, Subject name: Anaesthesia
[{'content': 'Drug producing Haematological side effect is:- \nSelect and explain. \nA. Nitrous oxide, B. Halothane, C. Ketamine, D. Sevoflurane', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Nitrous oxide inhibits Vitamin B12 dependent enzyme leading to Megaloblastic anemia and Peripheral Neuropathy.', 'role': 'assistant'}]