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': 'The neurotransmitter that is associated with suicidal tendencies is: \nSelect and explain. \nA. Serotonin, B. GABA, C. Nor-epinephrine, D. Acetylcholine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Serotonin', 'role': 'assistant'}]