This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ballistics, 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: Gun Powder is of two types: a) Black gun powder: Contains Potassium nitrate 75% + Charcoal 15% + sulphur 10% b) Smokeless Powder is of following types: -Single Base: Contains nitrocellulose -Double Base: contains nitrocellulose + nitroglycerine -Triple Base: Contains Nitrocellulose + Nitroglycerine + nitroguanidine