Which of these is a correct application of the Idempotent Law?
P∨P≡PP \lor P \equiv PP∨P≡P
P∨Q≡Q∨PP \lor Q \equiv Q \lor PP∨Q≡Q∨P
P∧(Q∨R)≡(P∧Q)∨(P∧R)P \land (Q \lor R) \equiv (P \land Q) \lor (P \land R)P∧(Q∨R)≡(P∧Q)∨(P∧R)
P∧True≡PP \land True \equiv PP∧True≡P