<prompt> Acquired mega-colon in children most commonly due toPsychological problemsBad bowel habitChagas diseaseHirschsprungs disease  <response>: MegacolonMegacolon is an abnormal dilatation of colon that is not caused by mechanical obstruction.Two main types of megacolon are -Congenital megacolon Hirschsprung diseaseAcquired megacolonPoor bowel habit Idiopathic Infections Chagas disease Medication Antipsychotic drugs 