Which of the following logical statements is a tautology?

  • A
    $[(p \to q) \land \sim q] \to \sim p$
  • B
    $(p \to q) \land (p \land \sim q)$
  • C
    $[(p \lor q) \land \sim p] \land \sim q$
  • D
    $[(p \lor \sim q) \lor (\sim p \land q)] \land r$

Explore More

Similar Questions

The correct logical equivalences from the following are: $(I)$ $p \to (q \to r) \equiv (p \land q) \to r$ $(II)$ $(p \to q) \to r \equiv p \to (q \lor r)$ $(III)$ $(p \to q) \to r \equiv (p \to r) \land (\sim q \to r)$ $(IV)$ $p \to (q \to r) \equiv q \to (p \to r)$

Negation of the statement: $3+6 > 8$ and $2+3 < 6$ is

The negation of the expression $q \vee ((\sim q) \wedge p)$ is equivalent to

Which of the following is equivalent to the Boolean expression $p \wedge \sim q$?

If the truth value of the Boolean expression $((p \vee q) \wedge (q$ $\rightarrow r) \wedge (\sim r))$ $\rightarrow (p \wedge q)$ is false,then the truth values of the statements $p, q, r$ respectively can be:

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo