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: Surgery
Nezelof s syndrome is recurrent episodes of ? 
Select and explain. 
A. Appendicitis, B. Cholecystitis, C. Intestinal obstruction, D. Pneumonia
D: Pneumonia
Answer: D: Pneumonia 
Explanation: Ans. is 'd' i.e., Pneumonia