'एंटीबायोटिक' (Antibiotic) किसके विरुद्ध कार्य करते हैं?

उत्तर: (D) जीवाणु (Bacteria) — Antibiotics fight Bacteria, NOT viruses. First antibiotic: Penicillin (discovered by Alexander Fleming, 1928). Antibiotics are ineffective against viral infections (cold, flu, COVID). Antifungals figh...