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': 'Absorption of mercury in the human body occurs least from \nSelect and explain. \nA. Lungs, B. Gastro-intestinal Tract, C. Skin, D. Kidneys', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]