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
Apnea of prematurity of lasts for ? 
Select and explain. 
A. 10 sec, B. 15 sec, C. 20 sec, D. 30 sec
C: 20 sec
Answer: C: 20 sec 
Explanation: None