UKMLA PLAB AMC USMLE Prometric MCQ

Question:
Johnny, a 5 year old child, presents with recurrent attacks of wheezes and respiratory difficulty that occurs at random times. Further investigation suggests the presence of asthma in this patient.
What the best treatment for little Johnny during these acute wheezing attacks?

a) Belcamethasone PO daily
b) Albuterol PO daily
c) Salmetarol inhaler as needed
d) Theophylline inhaler as needed
e) Cromonlyn sodium inhaler as needed