# DM-Groups and Lattice-Q15

+1 vote

Let $[P(S),\small \supseteq]$ is a partial order relation defined on P(S) and S= {1,2,3,4}. Which of the following is the complement of {1,2}?

A. {3,4}

B. {1,2,3,4}

C. Ø

D. {1,2}