This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Introduction to Central Nervous System, Subject name: Physiology
[{'content': 'Low molecular weight neurotransmitters are all except: \nSelect and explain. \nA. Glutamate, B. GABA, C. Dopamine, D. Orexins', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Low molecular weight neurotransmitters: (Small molecule transmitter) Glutamate GABA Ach NA Dopamine High molecular weight neurotransmitters: (Large molecule transmitter) NP Y Orexins Opioid CA', 'role': 'assistant'}]