What is Maxwell's electromagnetic theory?

Which of the following series correctly represents the energy of the radiation?

$X$-rays are produced due to

$\alpha$-rays have

$A$ magnet will cause the greatest deflection of

The energy of an electromagnetic radiation is $19.875 \times 10^{-13} \ erg$. What is its wave number in $cm^{-1}$? $(h = 6.625 \times 10^{-27} \ erg \ sec, c = 3 \times 10^{10} \ cm \ sec^{-1})$