Which one of the following Boolean expressions is a tautology?
Which one of the following Boolean expressions is a tautology?
- [JEE MAIN 2019]
- A
$\left( {p \vee q} \right) \wedge \left( {p \vee \sim q} \right)$
- B
$\left( {p \wedge q} \right) \vee \left( {p \wedge \sim q} \right)$
- C
$\left( {p \vee q} \right) \wedge \left( { \sim p \vee \sim q} \right)$
- D
$\left( {p \vee q} \right) \vee \left( {p \vee \sim q} \right)$
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