Which of the following statements are contrary to each other?
1.All movies are thrillers.
2.Some movies are not thrillers.
3.No movies are thrillers.
4.Some movies are thrillers.
A1 & 3 only ✓ Correct
B2 & 3 only
C1 & 4 only
D3 & 4 only
Correct answer: (A) 1 & 3 only
Explanation
Statements 1 and 3 are contraries, so both cannot be true yet both can be false.
Statement 1, all movies are thrillers, is the A form.
Statement 3, no movies are thrillers, is the E form.
A and E stand as contraries on the square of opposition.
Contraries cannot be true together but may be false together.
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