Q77. If A and B are two subsets of a universal set X, then A' ⊆ B if and only if:Mathematics — NUST Mock 10 — Question 77 of 200A. A ∪ B = XB. A ∩ B = ∅C. A ∩ B = AD. A ∪ B = ∅Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →