C-01-Q108mediumsingle_mcq(A∩B∩C)′=?(A \cap B \cap C)' = ?(A∩B∩C)′=?aA′∩B′∩C′A' \cap B' \cap C'A′∩B′∩C′bA′∪B′∪C′A' \cup B' \cup C'A′∪B′∪C′cA∪B∪CA \cup B \cup CA∪B∪CdA∩B∩CA \cap B \cap CA∩B∩C