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: Radiology
Basal ganglia calcification is associated with poisoning of? 
Select and explain. 
A. Carbon dioxide, B. Carbon monoxide, C. Hydrogen sulfide, D. Sulfur dioxide
B: Carbon monoxide
Answer: B: Carbon monoxide 
Explanation: Ans BCommon causes of basal ganglia calcification are aging, Fahr disease, carbon monoxide and lead poisoning, mineralizing microangiopathyMELAS, hypoparathyroidism, pseudohypoparathyroidism, TORCH infection.