<prompt> Most common cause of hematochezia in children?Rectal polypMeckels diveiculumNecrotizing enterocolitisAcute gastritis  <response>: Causes of Lower GI bleeding in children - Neonate anal fissure 1 month - 1 year anal fissure 1 year - 2 years Rectal polyp 2 years Rectal polyp 