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
Neurotransmitter which is implicated in both positive and negative symptoms in schizophrenia is: 
Select and explain. 
A. Noradrenaline, B. Serotonin, C. Dopamine, D. All of the above
C: Dopamine
Answer: C: Dopamine 
Explanation: Dopamine