Answer: Fungi.
- A Monera
- B Protista
- C Fungi
- D Plantae
Correct answer: C. Fungi
Explanation: Fungi are heterotrophic (mostly saprophytic) organisms whose cell walls are made of chitin.
Whittaker's five-kingdom system (1969) groups all cellular life by cell structure and nutrition; viruses, viroids, and lichens fall outside this system entirely since they aren't independently classifiable as one of the five.
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.