<prompt> True about Salter harris classification is-Thurston Holland sign is seen in type IV injuryType I injury has worst prognosisType II injury is fracture of necessityPhyseal crushing injury occurs in type V  <response>: Salter-Harris types Feature 1 Fracture line is entirely with in Physis causing epiphyseal slip 2 Fracture line extends from physis into the Metaphysis Thurston-Hollands fragment sign 3 Fracture line extends from physis into the Epiphysis causing epiphyseal split 4 Fracture line extends across the Epiphysis, aicular surface, Physis, and metaphysis 5 Crush injury of physis with initially normal X-rays 