This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other Respiratory Disorders, Subject name: Pediatrics
A 9-year-old boy came to OPD with well-controlled, moderately persistent asthma. He is taking sho-acting beta-agonists, daily inhaled steroids, and a leukotriene inhibitor. He is now complaining of white patches on his buccal mucosa. Next best step is? 
Select and explain. 
A. HIV testing, B. Rinse his mouth after use of inhaled medications, C. Measurement of serum immunoglobulins, D. Discontinuation of all his asthma medications
B: Rinse his mouth after use of inhaled medications
Answer: B: Rinse his mouth after use of inhaled medications 
Explanation: As the patient has moderately persistent asthma, he must be taking Inhaled steroids. Habit of failure to rinse his mouth after taking Inhaled steroids leads to Oral Candida infection (Thrush).