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': 'The most poisonous Mercury salt is: \nSelect and explain. \nA. Chloride, B. Oxide, C. Cyanide, D. Chromate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Chloride', 'role': 'assistant'}]