The shaded region in venn-diagram can be represented by which of the following ?

Let $A$ and $B$ be two sets then $(A \cup B)' \cup (A' \cap B)$ is equal to

Taking the set of natural numbers as the universal set, write down the complements of the following sets:

$\{ x:x$ is a positive multiple of $3\} $

Which of the following statement is false (where $A$ $\&$ $B$ are two non empty sets)

If $U=\{a, b, c, d, e, f, g, h\},$ find the complements of the following sets:

$A=\{a, b, c\}$

Taking the set of natural numbers as the universal set, write down the complements of the following sets:

$\{ x:x$ is an odd natural number $\} $