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: Physiology
Which of the following acts as the major neurotransmitter in substantia nigra: 
Select and explain. 
A. Dopamine, B. Noradrenaline, C. Acetylcholine, D. Acetylcholine
A: Dopamine
Answer: A: Dopamine 
Explanation: A i.e. Dopamine Dopamine is the major neurotransmitter in substantia nigraQ.