What is the approximate wavelength range of the electromagnetic spectrum?

$A$ radar sends waves towards a distant object and receives the signal reflected by the object. These waves are:

If the energy of an electromagnetic wave is $14.4 \, keV$,which region of the electromagnetic spectrum does it belong to?

List-$I$	List-$II$
$A$. $UV$ rays	$(i)$ Diagnostic tool in medicine
$B$. $X-$rays	$(ii)$ Water purification
$C$. Microwave	$(iii)$ Communication,Radar
$D$. Infrared wave	$(iv)$ Improving visibility in foggy days

Choose the correct answer from the options given below.

Match the electromagnetic radiations given in List-$I$ with their uses given in List-$II$.
| List-$I$ | List-$II$ |
| :--- | :--- |
| $A$) $X$-rays | $P$) Remote switches |
| $B$) $UV$-rays | $Q$) Finger prints in forensic labs |
| $C$) Radio waves | $R$) Crystal structure study |
| $D$) $IR$-rays | $S$) $TV$ communication system |

Which of the following electromagnetic radiations has the smallest wavelength?