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
Constituents of black gun powder is all EXCEPT: 
Select and explain. 
A. Charcoal, B. KNOB, C. Lead peroxide, D. Sulphur
C: Lead peroxide
Answer: C: Lead peroxide 
Explanation: C i.e. Lead Peroxide Smokeless gun powder is composed of nitrocellulose & nitroglycerineQ. Smoke producing black gun powder contains "PCS" i.e. potassium nitrate charcoal and sulfurQ. It is described as FG, FFG, FFFG depending on the fineness (F)/size of grain (G).