P, Q, R and S are four statements. Relation between these statements is as follows.

I. If P is true, then Q must be true.

II. If Q is true, then R must be true.

III. If S is true, then either Q is false or R is false.

Which of the following must be true?

Solution

Options B,C and D are given vice-versa to given statements which is not necessarily true.

But according to option A, P is true, then Q and R will be true too but S will be false as for S, either Q or R should be false.

So answer will be A.

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P, Q, R and S are four statements. Relation between these statements is as follows. I. If P is true, then Q must be true.II. If Q is true, then R must be true.III. If S is true, then either Q is false or R is false.Which of the following must be true?

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P, Q, R and S are four statements. Relation between these statements is as follows.

I. If P is true, then Q must be true.

II. If Q is true, then R must be true.

III. If S is true, then either Q is false or R is false.

Which of the following must be true?