Question: A 17-year-old boy presents with a 2-week history of worsening purulent nasal discharge, facial pain, and nasal obstruction. He denies any fever. Vital signs are normal. Physical examination demonstrates bilateral maxillary sinus tenderness. During treatment planning, he reports a history of anaphylaxis to penicillin. Which of the following is the best alternative treatment? Need Assignment Help? A. Metronidazole B. Clindamycin C. Doxycycline D. Clarithromycin