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
All are components of gun-powder except - 
Select and explain. 
A. Charcoal, B. Lead peroxide, C. Potassium nitrate, D. Sulphur
B: Lead peroxide
Answer: B: Lead peroxide 
Explanation: None