If P = {3, 7, 11, 13} and Q = {2, 4, 8, 16}, which of the following is correct

• A.\((P\cap Q)^l={2, 3, 4, 13}\)
• B.\(n(P\cup Q)=4\)
• C.\(P\cup Q = \emptyset\)
• D.\(P\cap Q = \emptyset\)