Which of the following is the most common cause of childhood asthma exacerbation
Question : Which of the following is the most common cause of childhood asthma exacerbation?
A. Viral infection (e.g., respiratory syncytial virus)
B. Allergic reaction (e.g., pollen, dust mites)
C. Exercise
D. Cold air
Answer: A
Explanation: Viral infections (such as respiratory syncytial virus, rhinovirus) are the most common triggers of childhood asthma exacerbations, especially in preschool children. Allergic reactions, exercise, and cold air are also common triggers but not the most common. Hence, the correct answer is A.
