The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A patient has seasonal allergic rhinitis and is on terfenadine. He develops cardiac arrhythmias after a course of antibiotics. Which of the following antibiotic could have been given:   (A) Ampicillin   (B) Tetracycline   (C) Erythromycin   (D) Co-trimoxazole
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