Which of the following is a saturated hydrocarbon?

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

\({\mathrm{C}}_{2}{\mathrm{H}}_{4}\)

\({\mathrm{C}}_{2}{\mathrm{H}}_{6}\)

\({\mathrm{C}}_{6}{\mathrm{H}}_{6}\)