Consider the Bohr's model of a one-electron atom where the electron moves around the nucleus. In the following List-I contains some quantities for the $n^{\mathrm{t}\mathrm{h}}$ orbit of the atom and List-II contains options showing how they depend on $n$ .
 

List - I	List - II
(I) Radius of the $n^{\mathrm{t}\mathrm{h}}$ orbit	$\left(\mathrm{P}\right)$ $\propto n^{-2}$
(II) Angular momentum of the electron in the $n^{th}$ orbit	$\left(\mathrm{Q}\right)$ $\propto n^{-1}$
(III) Kinetic energy of the electron in the $n^{\mathrm{t}\mathrm{h}}$ orbit	$\left(\mathrm{R}\right)$ $\propto n^0$
(IV) Potential energy of the electron in the $n^{\mathrm{t}\mathrm{h}}$ orbit	$\left(\mathrm{S}\right)$ $\propto n^1$
	$\left(\mathrm{T}\right)$ $\propto n^2$
	$\left(\mathrm{U}\right)$ $\propto n^{1/2}$

Which of the following options has the correct combination considering List-I and List-II?

• A

  $\left(\mathrm{I}\mathrm{I}\mathrm{I}\right),\mathrm{ }\left(\mathrm{S}\right)$
• B

  $\left(\mathrm{I}\mathrm{V}\right),\mathrm{ }\left(\mathrm{Q}\right)$
• C

  $\left(\mathrm{I}\mathrm{V}\right),\mathrm{ }\left(\mathrm{U}\right)$
• Correct answer
  D

  $\left(\mathrm{I}\mathrm{I}\mathrm{I}\right),\mathrm{ }\left(\mathrm{P}\right)$

Hence, the correct answer is option: 'D'.