This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Major Depression, Subject name: Psychiatry
[{'content': 'The aminoacid derived neurotransmitter used for treating depression is - \nSelect and explain. \nA. Serotonine, B. Histamine, C. acetylcholine, D. none', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Serotonin o The three main neuroiransmitters involved in depression are dopamine, norepinephrine and serotonin (5-HT). When brain levels of one or more neurotransmitter are low or unbalanced, depression can result. Generally, antidepressant drugs work by increasing production or decreasing the breakdown of one or more of these neurotransmitiers.", 'role': 'assistant'}]