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If the following statements are true: $ ~r$, $p \rightarrow q$ and $q \rightarrow r$, then:

(A) $r$ is true (B) $p$ is true (C) $q$ is true (D) $p$ is false
Can you answer this question?
 
 

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$\sim r$ is true $\rightarrow r$ is false. Therefore (A) is not the answer.
Also, $q \rightarrow r$ is true and $r$ is false $\rightarrow q$ is false. Therefore (C) is not the answer.
Similarly, since $q$ is false and $p \rightarrow q$ is true, $p$ must be false $\rightarrow$ (D) is the answer, not (B)
answered Mar 20, 2014 by balaji.thirumalai
 

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