This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mechanical injuries, Subject name: Forensic Medicine
Double based smokeless gun powder consist of - 
Select and explain. 
A. Nitrocellulose plus nitroglycerine, B. Nitrocellulose plus sulphur, C. Potassium nitrate plus nitroglycerine, D. Potassium nitrate plus charcoal
A: Nitrocellulose plus nitroglycerine
Answer: A: Nitrocellulose plus nitroglycerine 
Explanation: The synopsis of forensic medicine & toxicology ; Dr k.s narayan reddy ; 28th edition ; Pg.no. 125 Nitrocellulose -single base Nitrocellulose & nitroglycerin - double base Nitrocellulose, nitroglycerin, nitroguanidine - triple base