Fill in the blanks with most appropriate option.
Although a number of objects, such as kites, birds, aeroplanes move in space, but their shadow is not seen on the earth. This is due to the reason that the __i___, the region of complete __ii___ is not able to reach the earth. The region of partial __iii___, that is the __iv___ reaching the earth is too large and too faint to be visible to us.

	$\left(\mathrm{i}\right)$	$\left(\mathrm{i}\mathrm{i}\right)$	$\left(\mathrm{i}\mathrm{i}\mathrm{i}\right)$	$\left(\mathrm{i}\mathrm{v}\right)$
(A)	Penumbra	Darkness	Brightness	Umbra
(B)	Penumbra	Brightness	Darkness	Umbra
(C)	Umbra	Darkness	Brightness	Penumbra
(D)	Umbra	Brightness	Darkness	Penumbra