If $A=\left\{(x, y): y=e^x, x \in R\right\}$ and $B=\{(x, y): y=x, x \in R\}$, then
Answer & explanation
Correct answer: option 3
A is the set of all points on the graph of $y=e^x$. B is the set of all points on the line y = x. Since the curves are non intersecting, we have $A \cap B=\varphi$
Hence (3) is the correct answer.