Which of these logical equivalences is the Law of Idempotency?
P∧P≡PP \land P \equiv PP∧P≡P
P∧¬P≡FalseP \land \neg P \equiv FalseP∧¬P≡False
P∨True≡TrueP \lor True \equiv TrueP∨True≡True
P∧True≡PP \land True \equiv PP∧True≡P