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': 'Which of the following poison retards putrefaction- \nSelect and explain. \nA. Organophosphorus, B. Carbolic acid, C. Oxalic acid, D. Hydrogen chloride', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Carbolic acid retards putrefaction. Poisons which retard putrefaction are carbolic acid, arsenic, strychnine and zinc chloride.', 'role': 'assistant'}]