<prompt> Most common type of Hiatal hernia isSlidingRollingMixedNone of the above  <response>: Ans. is a i.e., Sliding Hiatal hernia is characterized by separation of the diaphragmatic crura and protrusion of the stomach into the thorax through the resulting gap. There are 4 types of hiatal herniaType I: Sliding hernia most common type 70 - 80Type II: Paraesophageal or rolling herniaType III: MixedType IV: Tese hernias are distinguished by the presence of other abdominal viscera wihin the defect i.e. omentum, transverse colon. 