If the proposition 'No mammals are aquatic animals' is given as true, then which of the following propositions can be directly inferred from it?

ASome mammals are not aquatic animals ✓ Correct

BSome aquatic animals are mammals

CSome mammals are non-animals

DSome non-mammals live in water

Correct answer: (A) Some mammals are not aquatic animals

Explanation

"Some mammals are not aquatic animals" is directly inferable.

The given "No mammals are aquatic animals" is an E proposition, taken true.

E is the superaltern of the corresponding O proposition.

By subalternation a true E makes the O true for the same terms.

Hence "Some mammals are not aquatic animals" follows directly.

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