Which electromagnetic waves are used in the medical field to destroy cancer cells?

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

List-$I$ (Electromagnetic waves)	List-$II$ (Wavelength)
$(a)$ $AM$ radio waves	$(i)$ $10^{-10} \, m$
$(b)$ Microwaves	$(ii)$ $10^{2} \, m$
$(c)$ Infrared radiations	$(iii)$ $10^{-2} \, m$
$(d)$ $X$-rays	$(iv)$ $10^{-4} \, m$

Choose the correct answer from the options given below:

The magnetic field in a plane electromagnetic wave is given by $B = 2 \times 10^{-7} \sin(0.5 \times 10^3 x + 1.5 \times 10^{11} t)$. This electromagnetic wave is .........

Match the List-$I$ with List-$II$. Choose the correct answer from the options given below:

List-$I$	List-$II$
$A.$ Radio-wave	$I.$ Produced by Magnetron valve
$B.$ Micro-wave	$II.$ Due to change in the vibrational modes of atoms
$C.$ Infrared-wave	$III.$ Due to inner shell electrons moving from higher energy level to lower energy level
$D.$ $X$-ray	$IV.$ Due to rapid acceleration of electrons

In which part of the Earth's atmosphere is the ozone layer located?

Which of the following radiations of electromagnetic waves has the highest wavelength?