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
Xanthoproteic reaction is due to the formation of 
Select and explain. 
A. Trinitrophenol, B. Mononitrophenol, C. Nitric acid, D. Pyrocathechol
A: Trinitrophenol
Answer: A: Trinitrophenol 
Explanation: Nitric acid is a powerful oxidising agent and reacts with organic matter to produce trinitrophenol, liberating nitrogen monoxide (xanthoproteic reaction).