A 16-year-old boy has a 1-day history of pain in the right ear

A 16-year-old boy has a 1-day history of pain in the right ear. He swims every morning. The right ear canal is red and swollen. He has pain when the auricle is pulled or the tragus is pushed. Which of the following is the most likely diagnosis?

a. Acute otitis media

b. Bullous myringitis

c. Chronic otitis media

d. External otitis

e. Mastoiditis