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': 'Occupational cancer involve following organs except? \nSelect and explain. \nA. Lung, B. Breast, C. Bladder, D. Skin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]