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': 'The sample taken below is sent for biochemical analysis in? \nSelect and explain. \nA. Hydrochloric acid, B. Phenol, C. Formalin, D. Fluoride', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The sample taken in image is Vitreous sample . A preservative Potassium/sodium fluoride 0.5-2%w/v is used for Collecting vitreous humour sample for ethanol analysis in postmoem toxicology cases.', 'role': 'assistant'}]