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
Specimens of toxicological studies are preserved in ? 
Select and explain. 
A. 10% of formaldehyde, B. Alcohol, C. Supersaturated solution of common salt, D. Rectified spirit
C: Supersaturated solution of common salt
Answer: C: Supersaturated solution of common salt 
Explanation: Ans. is 'c' i.e., Supersaturated solution of common salt Most common preservative for toxicological specimen is saturated solution of sodium chloride (NaC1).