Super set

Q.

Which of the following is not true for two non-empty sets A and B?

1. If A $\subset$ B and B $\subset$ A, then A = B.

2. For every set A, empty set $\varphi$ and A itself, are the subsets.

3. If A $\subset$B and A $\ne$B, then B is called superset of A.

4. If A $\subset$ B and A $\ne$B, then A is called superset of B.