If $A =$ [$x:x$ is a multiple of $3$] and $B =$ [$x:x$ is a multiple of $5$], then $A -B$ is ($\bar A$ means complement of $A$)

- A
$\bar A \cap B$

- B
$A \cap \bar B$

- C
$\bar A \cap \bar B$

- D
$\overline {A \cap B} $

Given the sets $A = \{ 1,\,2,\,3\} ,\,B = \{ 3,4\} , C = \{4, 5, 6\}$, then $A \cup (B \cap C)$ is

If $A$ and $B$ are disjoint, then $n(A \cup B)$ is equal to

Which of the following pairs of sets are disjoint

$\{1,2,3,4\}$ and $\{ x:x$ is a natural number and $4\, \le \,x\, \le \,6\} $

The shaded region in given figure is-

$A-(A-B)$ is