\documentclass[a5paper]{article}
\usepackage{automultiplechoice}
\begin{document}

\AMCidsPosition{pos=none}

\begin{examcopy}
  \AMCcodeH{student}{3}

  \begin{question}{letter}
    Choose a letter:
    \begin{choices}[o]
      \wrongchoice{A}\scoring{1}
      \wrongchoice{B}\scoring{2}
      \wrongchoice{C}\scoring{3}
      \wrongchoice{D}\scoring{4}
      \wrongchoice{E}\scoring{5}
      \wrongchoice{F}\scoring{6}
      \wrongchoice{G}\scoring{7}
      \wrongchoice{H}\scoring{8}
      \wrongchoice{I}\scoring{9}
      \wrongchoice{J}\scoring{10}
      \correctchoice{X}\scoring{20}
    \end{choices}
  \end{question}

\end{examcopy}

\end{document}
