This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Physiology
Which one of the following acts as the major neurotransmitter in substantia nigra 
Select and explain. 
A. Serotonin, B. Acetylcholine, C. Dopamine, D. Noradrenaline
C: Dopamine
Answer: C: Dopamine 
Explanation: (C) Dopamine > The long dopamine systems are the nigrostriatal system, which projects from the substantia nigra to the striatum and is involved in Motor control.