State whether each of the following set is finite or infinite :

The set of lines which are parallel to the $x\,-$ axis

Consider the sets

$\phi, A=\{1,3\}, B=\{1,5,9\}, C=\{1,3,5,7,9\}$

Insert the symbol $\subset$ or $ \not\subset $ between each of the following pair of sets:

$B \ldots \cdot C$

Given the sets $A=\{1,3,5\}, B=\{2,4,6\}$ and $C=\{0,2,4,6,8\},$ which of the following may be considered as universal set $(s)$ for all the three sets $A$, $B$ and $C$

$\varnothing$

Write the following as intervals :

$\{ x:x \in R,3\, \le \,x\, \le \,4\} $

Write the following sets in the set-builder form :

$\{ 2,4,6 \ldots \} $

Write the following sets in roster form :

$B = \{ x:x$ is a natural number less than ${\rm{ }}6\} $