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': '\\r\\nWhich of the following heavy metal poisoning may cause colitis that resembles diptheritic colitis? \nSelect and explain. \nA. Lead, B. Arsenic, C. Mercury, D. Copper', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Mercury colitis may resemble diptheritic colitis. Ref: Environmental and Chemical Toxins and Psychiatric Illness By James S Brown, Page 162; The Journal of Experimental Medicine', 'role': 'assistant'}]