This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
[{'content': "Which of the following may cause Parkinson's \nSelect and explain. \nA. Manganese, B. Iron, C. Copper, D. Lead", 'role': 'user'}, {'content': "Answer: A \nExplanation: Manganese causes Parkinson's disease. Other drugs and toxins which causes parkinson's are : Antipsychotic drugs, Metoclopramide, tetrabenazine, sodium valproate, lithium and MPTP.In the human body, manganese aids blood sugar regulation, bone formation, and immunity. However, exposure to excessive levels of manganese may trigger Parkinson's-like neurological symptoms. Manganese builds up in the basal ganglia area of the brain Reference : Harrison20th edition pg 2456", 'role': 'assistant'}]