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: Unknown
[{'content': 'Which one of the following is not an NMDA receptor? \nSelect and explain. \nA. Kappa, B. Kainate, C. AMPA, D. Glutamate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: A (Kappa) Ref: Basic & Clinical Pharmacology, Katzung 12th ed p.367 Explanation: Kappa is an opioid receptor whereas the others are NMDA receptors.', 'role': 'assistant'}]