Which of the following propositions can be directly inferred from the statement All mammals are four-legged animals?

AAll animals are four-legged mammals

BNo four-legged mammals are animals

CSome mammals are four-legged animals ✓ Correct

DAll four-legged animals are mammals

Correct answer: (C) Some mammals are four-legged animals

Explanation

Some mammals are four-legged animals follows directly from the given universal.

All mammals are four-legged animals is an A proposition.

By subalternation an A statement yields its particular I of the same terms.

So the truth of All mammals are four-legged animals guarantees Some mammals are four-legged animals.

This immediate inference keeps the subject and predicate unchanged.

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