<prompt> Presence of spiral grooves in the barrel of weapon is referred to as -RiflingIncendiaryCockingNone of the above  <response>: The synopsis of forensic medicine toxicology ; Dr k.s narayan reddy ; 28th edition ; pg.no 123 124 The bore is cut internally with number of shallow ,spiral grooves varying from two to more than twenty ,the most common being six ,which run parallel to each other but twisted spirally ,from breech to muzzle . The groove are called rifling and the projecting ridges between these grooves are called lands. 