Statements: All teachers are girls. No girl is dull. Choose the conclusion(s) that logically follow.

1.No boy is a teacher

2.No teacher is dull

AOnly conclusion I follows

BOnly conclusion II follows ✓ Correct

CBoth conclusions I and II follow

DNeither conclusion I nor II follows

Correct answer: (B) Only conclusion II follows

Explanation

Only the second conclusion, that no teacher is dull, follows.

'All teachers are girls' puts teachers within girls.

'No girl is dull' excludes every girl from dullness.

So teachers, being girls, are excluded from dullness too.

'Boy' appears in no premise, so nothing about boys can be inferred.

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