<prompt> Double based smokeless gun powder consist of -Nitrocellulose plus nitroglycerineNitrocellulose plus sulphurPotassium nitrate plus nitroglycerinePotassium nitrate plus charcoal  <response>: 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 