\documentclass{exam}

    \usepackage[dvipsnames]{xcolor}
    \usepackage[colorlinks]{hyperref}

    \printanswers
    \addpoints

    % For the exam package
    \newcommand{\qs}{\question[1\half]}
    \newcommand{\ch}{\choice}
    \newcommand{\cc}{\CorrectChoice}
    \CorrectChoiceEmphasis{\slshape\color{OliveGreen}}
    \renewcommand{\thechoice}{\alph{choice}}
    \renewcommand{\choicelabel}{(\thechoice{})}

    \begin{document}

    \begin{questions}

      \qs Which one
      \begin{choices}
        \cc According
        \ch For
        \ch IF
        \ch All
      \end{choices}

      \qs Based on
      \begin{choices}
        \ch mou
        \cc ske
        \ch s
        \ch un
      \end{choices}

      \qs Suppose
      \begin{oneparchoices}
        \ch $0.67$
        \cc $0.56$
        \ch $0.48$
        \ch $0.64$
      \end{oneparchoices}

      \qs You a
      \begin{oneparchoices}
        \ch $-1/16$
        \cc $-1/8$
        \ch $-3/16$
        \ch $-1/2$
      \end{oneparchoices}

    \end{questions}

    \end{document}