This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Toxicology - 1, Subject name: Forensic Medicine
[{'content': 'Specimen for Toxicological (Chemical) analysis are commonly preserved using: \nSelect and explain. \nA. Rectified spirit, B. Alcohol, C. 10% Formaldehyde, D. Saturated solution of sodium chloride', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]