What is the dual of the proposition (P∨Q)∧(R∨S)(P \lor Q) \land (R \lor S)(P∨Q)∧(R∨S)?
(P∧Q)∨(R∧S)(P \land Q) \lor (R \land S)(P∧Q)∨(R∧S)
(P∨Q)∧(R∨S)(P \lor Q) \land (R \lor S)(P∨Q)∧(R∨S)
¬(P∧Q)∨¬(R∧S)\neg(P \land Q) \lor \neg(R \land S)¬(P∧Q)∨¬(R∧S)
(P∧Q)∧(R∧S)(P \land Q) \land (R \land S)(P∧Q)∧(R∧S)