Given below are two statements: one is labelled as Assertion $\mathbf{A}$ and the other is labelled as Reason $\mathbf{R}$

Assertion A : EM waves used for optical communication have longer wavelengths than that of microwave, employed in Radar technology.

Reason R : Infrared EM waves are more energetic than microwaves, (used in Radar)

In the light of given statements, choose the correct answer from the options given below.

1. A Both $\mathrm{A}$ and $\mathrm{R}$ are true but $\mathrm{R}$ is NOT the correct explanation of $\mathrm{A}$
2. B $\mathrm{A}$ is true but $\mathrm{R}$ is false
3. C Both $\mathrm{A}$ and $\mathrm{R}$ are true and $\mathrm{r}$ is the correct explanation of $\mathrm{A}$
4. D $\mathrm{A}$ is false but $\mathrm{R}$ is true Correct answer