$$\begin{matrix} & CH_3 \\ & |\\CH_3&CCH_2 &CH_3\\&|\\&CH_2CH_3\end{matrix}$$
The IUPAC nomenclature of the compound above is

• A.2-ethyl-3-methylbutane
• B.3,3-dimethylpentane
• C.2-ethyl-2-methylbutane
• D.2,2-dimethylhexane