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': 'For biochemical analysis vitreous in sent in: \nSelect and explain. \nA. Hydrochloric acid, B. Phenol, C. Formalin, D. Fluoride', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Fluoride', 'role': 'assistant'}]