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
Rotten egg odour is not characteristic with which substance 
Select and explain. 
A. Disulfiram, B. Hydrogen sulphide, C. N - Acetyl cysteine, D. Nitrobenzene
D: Nitrobenzene
Answer: D: Nitrobenzene 
Explanation: Rotten egg odour can be felt in - Disulfiram, Mercaptans, N acetyl cysteine, Hydrogen sulphide.