<prompt> Penetrating injury to NECK is defined as -More than 2 cm deep injuryInjury to any internal neck organViolation of platysmaSharp Instrument  <response>: The synopsis of forensic medicine toxicology;Dr k.s narayan reddy; 28th edition ; pg.no. 114; A penetration wound is produced when the weapon enters a cavity of body . In penetrating injury to neck there is violation of platysma . 