Both contrary propositions cannot be

ATrue ✓ Correct

BFalse

CTrue and false

DDoubtful

Correct answer: (A) True

Explanation

Both contrary propositions cannot be true together.

The A and E forms make opposite universal claims about the same class.

If every S were P and also no S were P, that is impossible.

At most one of them can be true; they may both be false.

This "not both true" limit is the core rule of contraries.

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