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
In depressions, there is deficiency of ? 
Select and explain. 
A. 5-HT, B. Acetylcholine, C. Dopamine, D. GABA
A: 5-HT
Answer: A: 5-HT 
Explanation: Ans. A. 5-HTDepression = Decrease in serotonin and norepinephrine.Serotonin is the most imPoant neurotransmitter in depression.Mania= Increased of norepipherine.