<prompt> Acquired megacolon in children most commonly due to-Psychological problemsBad bowel habitChagas diseaseHirschsprungs disease  <response>: Ans. is b i.e., Bad bowel habit Megacolon Megacolon is an abnormal dilatation of colon that is not caused by mechanical obstruction. Two main types of megacolon are ? 1 Congenital megacolon -- Hirschsprung disease 2 Acquired megacolon Poor bowel habit Infections -- chagas disease Idiopathic Medication Antipsychotic drugs 