Multiple choice Which of the following is an antibiotic? Aspirin Paracetamol Penicillin Sulphadizine Reveal answer Fill a bubble to check yourself C Correct answer Explanation Penicillin is a group of antibiotics derived from Penicillium fungi, used to treat bacterial infections. Aspirin and paracetamol are analgesics, and sulphadiazine is a sulfonamide.