This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: New born infants, Subject name: Pediatrics
Apnea of prematurity of new born 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: *Apnoea is defined as cessation of respiration for 20 sec with or without bradycardia and cyanosis or for shoer periods if it is associated with cyanosis or bradycardia. It's a common problem in preterm neonates . It could be central , obstructive or mixed. Apnoea of prematurity occurs in preterm neonates between the 2nd to 5th days of life and is because of the immaturity of the developing brain. Reference : page 167 168 Ghai Essential Pediatrics 9 th editionedition