Arrange the following group of terms in order of decreasing extension.

1.Mammal

2.Animal

3.Tiger

4.Feline

A2, 1, 3, 4

B1, 2, 4, 3

C3, 4, 1, 2

D2, 1, 4, 3 ✓ Correct

Correct answer: (D) 2, 1, 4, 3

Explanation

The order from widest to narrowest class is Animal, Mammal, Feline, Tiger.

Extension is the set of objects a term denotes, so the term covering the most things comes first.

Animal embraces every mammal, every feline and every tiger, so it is broadest.

Mammal is narrower than animal, feline narrower than mammal, and tiger narrowest of all.

Ranking by shrinking denotation gives 2, 1, 4, 3.

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