- A bacteriophage
- B a protozoan
- C a lichen
- D a mycoplasma
Correct answer: A. bacteriophage
Explanation: A bacteriophage is a virus that attacks bacterial cells.
Concept context
Whittaker's five kingdom system covering Monera, Protista, Fungi, plus viruses, viroids, and lichens. A foundational NEET chapter on how living organisms are grouped.