This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
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 – 
Select and explain. 
A. Cystic Fibrosis, B. Maple Syrup urine Disease, C. Bilirubin Congugation Defect, D. Criggler Najar Syndrome
A: Cystic Fibrosis
Answer: A: Cystic Fibrosis 
Explanation: Recurrent chest infection in a child with evidence of exocrine pancreatic insufficiency (bulky, foul smelling stool) suggest a diagnosis of cystic fibrosis.