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: Forensic Medicine
[{'content': 'Mercury pollution is caused by all, except: LIPSC 14 \nSelect and explain. \nA. Compact fluorescent lamp, B. Incandescent bulb, C. LED bulb, D. Fluorescent lamp', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. LED bulb', 'role': 'assistant'}]