As per the traditional square of opposition, which of the following statements are subalternates?

1.All plants are oxygen-producers

2.No plants are oxygen-producers

3.Some plants are not oxygen-producers

4.Some plants are oxygen-producers

A2 & 4 only

B3 & 4 only

C2 & 3 only ✓ Correct

D1 & 2 only

Correct answer: (C) 2 & 3 only

Explanation

Statements 2 and 3 stand in the subalternation relation.

Statement 2 "No plants are oxygen-producers" is the universal E.

Statement 3 "Some plants are not oxygen-producers" is the particular O.

E is the superaltern and O its subaltern of the same terms.

Truth flows downward from E to O, which is subalternation.

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