A child is brought to the paediatric OPD with fever of 24 hours duration. History reveals 3 episodes of chest infection and passage of foul smelling stools. The most probable diagnosis is-

Ans. is 'a' i.e., Cystic Fibrosis o Recurrent chest infection in a child with evidence of exocrine pancreatic insufficiency (bulky, foul smelling stool) suggest a diagnosis of cystic fibrosis.