WAEC Mathematics 2006 Question 42

If P = {1, 3, 5, 7, 9} and Q = {2, 4, 6, 8, 10} are subsets of a universal set U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, what are the elements of P′ ∩ Q′?

1. A.{1, 3, 5, 7, 9}
2. B.{2, 4, 6, 8, 10}
3. C.∅
4. D.{1, 2, 6, 8, 10}