Match List-$I$ (Electromagnetic wave type) with List-$II$ (Its association/application) and select the correct option from the choices given below the lists:

List-$I$	List-$II$
$a$. Infrared waves	$i$. To treat muscular strain
$b$. Radio waves	$ii$. For broadcasting
$c$. $X$-rays	$iii$. To detect fracture of bones
$d$. Ultraviolet rays	$iv$. Absorbed by the ozone layer of the atmosphere

Given below are some famous numbers associated with electromagnetic radiations in different contexts in physics. State the part of the electromagnetic spectrum to which each belongs.
$(a)$ $21 \; cm$ (wavelength emitted by atomic hydrogen in interstellar space).
$(b)$ $1057 \; MHz$ (frequency of radiation arising from two close energy levels in hydrogen; known as Lamb shift).
$(c)$ $2.7 \; K$ (temperature associated with the isotropic radiation filling all space; thought to be a relic of the 'big-bang' origin of the universe).
$(d)$ $5890 \; \mathring{A} - 5896 \; \mathring{A}$ (double lines of sodium).
$(e)$ $14.4 \; keV$ (energy of a particular transition in $^{57}Fe$ nucleus associated with a famous high-resolution spectroscopic method, Mossbauer spectroscopy).

How are infrared waves produced?

Both $X$-rays and $\gamma$-rays are electromagnetic waves. Which of the following statements is true for them?

Which of the following can be used in cancer treatment?

Infrared rays can be detected by .......