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': 'Neurotransmitter which is implicated in both positive and negative symptoms in schizophrenia is: \nSelect and explain. \nA. Noradrenaline, B. Serotonin, C. Dopamine, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Dopamine', 'role': 'assistant'}]