Mathematics · 2019
JEE Main · 11 January 2019, Shift 1 · Q90
If q is false and p ∧ q ↔ r is true, then which one of the following statements is a tautology?
If q is false and p $\displaystyle \wedge \mathrm{q} \leftrightarrow \mathrm{r}$ is true, then which one of the following statements is a tautology ?
Official answer
(3)
$\displaystyle (\mathrm{p} \wedge \mathrm{r}) \rightarrow(\mathrm{p} \vee \mathrm{r})$
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JEE Main 2019 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.