This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Forensic Medicine
[{'content': 'Most common poisonous salt of mercury is - \nSelect and explain. \nA. Chloride, B. Nitrate, C. Sulfide, D. Iodide', 'role': 'user'}, {'content': 'Answer: A \nExplanation: inorganic compounds of mercury Mercuric oxide Mercuric chloride Mercuric iodide Mercuric cyanide Mercuric nitrate Mercuric sulphide Mercuric sulphate Mercurous chloride Mercurous nitrate REF;THE SYNOPSIS OF FORENSIC MEDICINE:KS NARAYANA REDDY;28th EDITION;PAGE NO 306', 'role': 'assistant'}]