Making mchoice question behaves as schoice in `exams2moodle()` of package exams

Question

I'm using the rexams package to create questionaries for Moodle with the exams2moodle() function.
I would like to create an mchoice question with, for instance, 5 true answers and 10 false answers. Ok, but I would like that this mchoice question behaves as an schoice question; that is, that finally an schoice question is created from the mchoice.
The final created schoice question would have 1 true answer (taken randomly from the 5 true answers in the mchoice question) and 3 false answers (from the 10 false answers in the mchoice).
I think this is possible within the rexams package, at least I remember to have seen it, but I cannot do it. Thanks

Answer 1

See here:

exshuffle is set to 5 so that 1 correct and 4 random wrong alternatives are subsampled and shuffled

An MWE (in .Rnw):

\exname{Test}
\extype{schoice}
\exsolution{11100000} % true, true, true and the others are false
\exshuffle{5}
\begin{question}
  Question text.
  \begin{answerlist}
  \item a
  \item b
  \item c
  \item 1
  \item 2
  \item 3
  \item 4
  \item 5
  \end{answerlist}
\end{question}