Which of the following compounds is oxidised to prepare methyl ethyl ketone?

The Compound is oxidised to prepare methyl ethyl ketone is 2-Butanol

$$\begin{gathered} {\mathrm{CH}}_3{\mathrm{CHCH}}_2{\mathrm{CH}}_3\stackrel{ }{\stackrel{\left[O\right]}{\to } {{\mathrm{CH}}_3}_{ }{{\mathrm{COCH}}_2}_{ }{{\mathrm{CH}}_3}_{ }} \\ \overline{) } \\ OH \end{gathered}$$