\documentclass[a4paper]{article}
\usepackage[separateanswersheet,calibration]{automultiplechoice}
\begin{document}


\element{grq}{
  \begin{question}{arm}
    Which letter shows the \textit{arm} on the diagram?
    \AMCBoxOnly{}{\wrongchoice[A]{}\correctchoice[B]{}%
      \wrongchoice[C]{}\wrongchoice[D]{}}
  \end{question}
}

\element{grq}{
  \begin{question}{foot}
    Which letter shows the \textit{foot} on the diagram?
    \AMCBoxOnly{ordered=true,help=foot}{\correctchoice[A]{}\wrongchoice[B]{}%
      \wrongchoice[C]{}\wrongchoice[D]{}}
  \end{question}
}

\onecopy{5}{

  \begin{center}
    \bf\Large Questions
  \end{center}

  Include here a diagram...

  \vspace{5mm}

\shufflegroup{grq}
\insertgroup{grq}

\clearpage \AMCformBegin

\begin{center}
  \bf\Large Answers...
\end{center}

\hspace*{\fill}\namefield{\fbox{
\begin{minipage}{15em}
Name and surname:\vspace*{3ex}\par
\noindent\dotfill\vspace{2mm}
\end{minipage}
}}

\AMCform

}

\end{document}
