What Is the Correct Assignment of Common Names for the Following

Multiple Choice

What is the correct assignment of common names for the following molecules? i. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{3}$

ii. $\quad$$\mathrm{CH}_{3}$
$\quad$$\quad$ |
$\mathrm{CH}_{3} \mathrm{CHCH}_{3}$

iii. $\mathrm{CH}_{3}$
$\quad$$\quad$ |
$\mathrm{CH}_{3} \mathrm{CCH}_{3}$
$\quad$$\quad$ |
$\quad$$\mathrm{CH}_{3}$

A) i = butane; ii = neopentane; iii = isopentane
B) i = neobutane; ii = isobutane; iii = pentane
C) i = butane; ii = isobutane; iii = isopentane
D) i = butane; ii = isobutane; iii = neopentane