This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: High-Risk Infant - Prematurity & Intrauterine Growth Restriction, Subject name: Pediatrics
Apnea of prematurity - 
Select and explain. 
A. > 10 sec, B. > 15 sec, C. > 20 sec, D. > 30 sec
C: > 20 sec
Answer: C: > 20 sec 
Explanation: Ans. is 'c' i.e., > 20 sec o Apnea of prematurity defined as sudden stoppage of breathing that lasts for 20 sec or is associated with bradycardia or cyanosis.Apnea of prematurity should be differentiated from periodic breathing which is normal phenomenon is preterm neonate.