Which of the following are not electromagnetic waves?

The ozone layer in the Earth's atmosphere is essential for the protection of human life because it...

Which of the following waves has the maximum wavelength?

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).

The frequency range of visible light is . . . . . . .

Match List-$I$ with List-$II$:

List-$I$ ($EM$ Wave)	List-$II$ (Wavelength Range)
$(A)$ Infrared	$(i)$ $ < 10^{-3} \, nm$
$(B)$ Ultraviolet	$(ii)$ $400 \, nm$ to $1 \, nm$
$(C)$ $X$-rays	$(iii)$ $1 \, mm$ to $700 \, nm$
$(D)$ Gamma rays	$(iv)$ $1 \, nm$ to $10^{-3} \, nm$

Choose the correct answer from the options given below: