This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
[{'content': 'Which of the following metal ions is associated with secondary Parkinsonisms \nSelect and explain. \nA. Mangnese, B. Magnesium (Mg), C. Selenium (Se), D. Molybednum (Me)', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Manganese ion exposure is implicated in the free radical damage of the basal ganglia causing Parkinsonism. Toxins Implicated in Parkinsonism Manganese (Mn) MPTP (1 Methyl - > Phenyl -1, 2, 3, 6 tetrahydropyridine) Carbonmonoxide Carbondisulphide Ctanide Hexane Methanol Toxins repoed to induce Parkinonism: (Handbook of Atypical Parkinsonism) Betel nut (plus antiPsychotics) Carbon monoxide Contrast agent for cardiac catheterization Cyanide Ethanol intoxication, ethanol withdrawal Ethylene glycol Herbicides (paraquat, diquat, glyphosate) Heroin Hydrogen sulfide Kava-kava Manganese REF: Harrison book of internal medicine 21ST EDITION', 'role': 'assistant'}]