Subset and Superset

Q. If a set $A$ is not a subset of another set $B,\Rightarrow A\subset ̸B.$

1. False
2. True

Q. Let $A=\{2,4,6\}$ and $B=\{x:x\text{is an even natural number less than}8\}$, then which of the following is/are correct?

1. $A\subset B$
2. $B\subset A$
3. $A\ne B$
4. $n\left(A\right)<n\left(B\right)$

Q. If $A$ and $B$ are finite sets and $A\subset B,$ then

1. $n(A\cup B)=n\left(A\right)$
2. $n(A\cap B)=n\left(B\right)$
3. $n(A\cup B)=n\left(B\right)$
4. $n(A\cap B)=\varphi$

Q.

If the sets A and B are defined as A = {(x, y) : y = $e^x$, x ∈ R};

B = {(x, y) : y = x, x ∈ R}, then

1. B ⊆ A

2. A ⊆ B

3. A ∩ B = ∅

4. A ∪ B = A