- A R. H. Whittaker
- B Carolus Linnaeus
- C Charles Darwin
- D Gregor Mendel
Correct answer: A. R. H. Whittaker
Explanation: Whittaker proposed the five-kingdom classification in 1969.
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.