This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Pharmacology
[{'content': 'Which does not act by blocking NMDA receptors- \nSelect and explain. \nA. Methoxetamine, B. Methadone, C. Ketamine, D. Diltiazem', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Diltiazem o Drugs acting bv blocking NMD A receptors are:i) Methoxetamineii) Methadoneiii) Felbamateiv) Acamprostv) Ketaminevi) Phencyclidinevii) Dizocilpineviii) Dextropropoxypheneix) Tramadolx) Pethidinexi) Atomoxetinexii) Nitrous oxide", 'role': 'assistant'}]