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
Parkinson's disease is caused by the degeneration of which one of the following biochemically distinct neural pathways? 
Select and explain. 
A. Nigrostriatal adrenergic, B. Nigrostriatal dopaminergic, C. Intrastriatal cholinergic, D. Intrastriatal gabaergic
B: Nigrostriatal dopaminergic
Answer: B: Nigrostriatal dopaminergic 
Explanation: (B) Nigrostriatal dopaminergic