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
The preservative of choice in this poisoning: 
Select and explain. 
A. Rectified spirit, B. Saturated solution of sodium chloride, C. Formalin, D. Sodium flouride
B: Saturated solution of sodium chloride
Answer: B: Saturated solution of sodium chloride 
Explanation: The most commonly used preservative for viscera is saturated solution of common salt (NaCl) because It is easily available, cheap and effective preservative. However, the best preservative for preservation of viscera is rectified spirit. z In cases of suspected alkali or acid poisoning (except carbolic acid), only rectified spirit is used.