This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Pediatrics
[{'content': 'Apnea in infant is \nSelect and explain. \nA. > 10 sec, B. > 20 sec, C. > 30 sec, D. > 40 sec', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Apnea may be defined as cessation of respiraton for 20s with or without bradycardia and cyanosis or for shoer periods if it is associated with bradycardia and cyanosis.Apnea is a central problem in preterm neonates.It could be central ,obstructive, or mixed. In preterm neonates it occurs in 2-5 th day of life and is because of the immaturity of the developing brain.Central apnea can also occur due to pathological causes like sepsis,metabolic problems,temperature instability,respiratory distress, anemia ,polycytemia. Treatment:suppoive,underlying cause corrected.Drugs used include aminophylline and caffeine. Ref : ESSENTIAL PEDIATRICS,O.P.GHAI,PG NO:146,7th edition', 'role': 'assistant'}]