If A, B are two sets, then A∪(B∩A)′ is

If A, B are two sets, then $A \cup (B \cap A)^{'}$ is

A
$ϕ$
B
$U$
C
A
D
B

Solution:

$A \cup (B \cap A)^{'} = A \cup (B^{'} \cup A^{'})$

$= (A \cup A^{'}) \cup B^{'} = U \cup B^{'} = U$

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