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 8 year old boy presents with recurrent pneumonia since birth. The boy had a history of delayed passage of Meconium at  birth. Probable diagnosis is 
Select and explain. 
A. Kartagener's syndrome, B. Bronchiectasis, C. Cystic fibrosis, D. Hirnchiprung disease
C: Cystic fibrosis
Answer: C: Cystic fibrosis 
Explanation: Features of Cystic fibrosis

Delayed passage of Meconium
Recurrent pneumonia
Steatorrhea
Late onset Diabetes
Azoospermia