Which is ethoxy ethane?

\({\mathrm{C}}_{2}{\mathrm{H}}_{5}{\mathrm{OCH}}_{3}\)

\({\mathrm{CH}}_{3}{\mathrm{OCH}}_{3}\)

\({\mathrm{C}}_{2}{\mathrm{H}}_{5}{\mathrm{OC}}_{2}{\mathrm{H}}_{5}\)

None of these