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The FIVE-KINGDOM classification system was proposed in 1969 by:

AR.H. Whittaker, in his classic biology paper
BCarolus Linnaeus, in his Systema Naturae
CCharles Darwin, in his Origin of Species
DAristotle, in his ancient Greek manuscripts
Answer & Solution
Correct answer: A. R.H. Whittaker, in his classic biology paper
R.H. Whittaker proposed the five-kingdom system in 1969: Monera, Protista, Fungi, Plantae, Animalia. Linnaeus founded modern classification (1758) but used a two-kingdom system. Darwin proposed natural selection (1859).
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