An EM wave has energy of the order of 20 eV. Which part of the EM wave spectrum does it belong to?

Correct option is A

​$$\textbf{Given:} \\\text{Energy of the electromagnetic (EM) wave, } E = 20 \, \text{eV}\\[10pt]E = \frac{hc}{\lambda} \Rightarrow \lambda = \frac{1240}{E}\\[10pt]\lambda = \frac{1240}{20} = 62 \, \text{nm}$$

$$\begin{aligned}\textbf{Wavelength Range:} \\\bullet\ \text{Ultraviolet (UV) rays: } 400\,\text{nm} \text{ to } 0.6\,\text{nm} \\\bullet\ \text{Visible light: } 700\,\text{nm} \text{ to } 400\,\text{nm}\end{aligned}$$​​​