This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
[{'content': 'How much fraction of methyl mercury is absorbed from the Gut: \nSelect and explain. \nA. 20%, B. 50%, C. 80%, D. 100%', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]