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: Psychiatry
[{'content': 'In depressions, there is deficiency of ? \nSelect and explain. \nA. 5-HT, B. Acetylcholine, C. Dopamine, D. GABA', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. 5-HTDepression = Decrease in serotonin and norepinephrine.Serotonin is the most imPoant neurotransmitter in depression.Mania= Increased of norepipherine.', 'role': 'assistant'}]