Multiple choice Which of the following statements is not true? Some disinfectants can be used as antiseptics at low concentration. Sulphadiazine is a synthetic antibacterial. Ampicillin is natural antiboitic. Aspirin is both analgesic and antipyretic. Reveal answer Fill a bubble to check yourself C Correct answer Explanation Ampicillin is a semi-synthetic penicillin derivative, not a natural antibiotic. Natural penicillins (like penicillin G and V) are produced directly by Penicillium mold, while ampicillin is chemically modified.