This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Toxicology - 3, Subject name: Forensic Medicine
[{'content': 'Which of the following order is true about toxicity of mercury \nSelect and explain. \nA. Organic salts > mercuric salts> mercurous salts, B. Mercuric salts> organic salts> mercurous salts, C. Mercuric salts > mercurous salts> organic salts, D. Mercurous salts > organic salts> mercuric salts', 'role': 'user'}, {'content': 'Answer: A \nExplanation: There are 3 forms of mercury :- 1. Organic - most toxic 2. Mercuric- intermediate 3. Mercurous -least toxic', 'role': 'assistant'}]