If the statement 'Some plants are not carnivorous' is given as false, then which of the following could be immediately inferred from it?

1.'Some plants are carnivorous' is true

2.'Some plants are carnivorous' is false

3.'No plants are carnivorous' is false

4.'All plants are carnivorous' is true

A2, 3 & 4 only

B1 & 4 only

C1 & 3 only

D1, 3 & 4 only ✓ Correct

Correct answer: (D) 1, 3 & 4 only

Explanation

A false O proposition makes its contradictory A true, and from A the I and the denial of E follow.

'Some plants are not carnivorous' is the O proposition, given as false.

Its contradictory 'All plants are carnivorous' is therefore true (Statement 4).

From this true A, 'Some plants are carnivorous' is true (Statement 1).

Also 'No plants are carnivorous,' the contrary E, must be false (Statement 3).

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