Acquired mega-colon in children most commonly due to –: (A) Psychological problems, (B) Bad bowel habit, (C) Chaga's disease, (D) Hirschsprung's disease
Answer is B. Megacolon

Megacolon is an abnormal dilatation of colon that is not caused by mechanical obstruction.
Two main types of megacolon are -


Congenital megacolon → Hirschsprung disease
Acquired megacolon


Poor bowel habit                             
Idiopathic             
Infections → Chaga's disease 
Medication Antipsychotic drugs