Examine whether the following statements are true or false :

$\{a\} \subset\{a, b, c\}$

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 $C$

$\varnothing$

Let $A=\{1,2,3,4,5,6\} .$ Insert the appropriate symbol $\in$ or $\notin$ in the blank spaces:

$ 5\, .......\, A$

Write the following sets in roster form :

$D = \{ x:x$ is a prime number which is divisor of $60\} $

Which of the following sets are finite or infinite.

$\{1,2,3, \ldots 99,100\}$

Let $A$ and $B$ be two non-empty subsets of a set $X$ such that $A$ is not a subset of $B$, then