<prompt> Gutter fracture is due toSharp edged weaponFire arm injuryBlunt weaponSerrated edge  <response>: Bullet striking on the skull but not entering it: Bullet may tangentially touch the skull and doesnt enter the skull cavity . In such a case , there may be a gutter that is produced on the skull- Gutter fracture ref: FORENSIC MEDICINE AND TOXICOLOGY DR PC IGNATIUS THIRD EDITION PAGE 154 