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': 'A child is having nocturnal asthmatic attacks 2 times in a week and day time attacks 3 times or more. This child is categorized to be having \nSelect and explain. \nA. Mild persistent asthma, B. Mild intermittent asthma, C. Severe persistent asthma, D. Moderate persistent asthma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: .intermittent :<1 time a week ,asymptomatic,normal PEFR between attack,nocturnal attack less than or equal to 2 per month mild persistant :>1 time a week but less than 1 time a day,noctunal attack>2 /month moderate persistant :daily use beta 2 agonist, attack affect activity,nocturnal attack>1/week severe persistant :continuous, limited physical activity,nocturnal attack frequent Ref : ESSENTIAL PEDIATRICS,O.P.GHAI,PG NO:363, 7th edition', 'role': 'assistant'}]