Randomly selecting subquestions in exsheets

Question

Here in the MWE:

\documentclass{article}
\usepackage{exsheets}
\SetupExSheets{counter-format=}
\begin{document}
\begin{question}[name=Answer the following in one sentence]
  \begin{enumerate}
    \item Who is the President?
    \item Who is the Prime minister?
    \item \includequestions[random=2]{classA}
  \end{enumerate}
\end{question}
\end{document}

The contents of classA.tex are:

\begin{input}
  \begin{question}
    Who is the Defence Minister?
  \end{question}
  \begin{question}
    Who is the Home Minister?
  \end{question}
  \begin{question}
    Who is the Finance Minister?
  \end{question}
  \begin{question}
    Who is the External Affairs Minister?
  \end{question}
\end{input}

Here is how it looks when compiled:

The problem is around Item No. 3. The question text is repeated and the counter does not advance.

How do I overcome this? So, it will select questions randomly and will assign item nos. 3 and 4 to them?

If exsheets can not do this, is there another package that can do this?

Answer 1

I don't think a satisfactory solution can be obtained with exsheets but it can with its successor xsim – the trick is to define another exercise type solely used for the subquestions.

\documentclass{article}
\usepackage{xsim}

\DeclareExerciseType{subquestion}{
  exercise-env = question ,
  solution-env = answer ,
  exercise-name = Question ,
  solution-name = Answer ,
  exercise-template = item ,
  solution-template = item
}

\DeclareExerciseProperty{title}

\DeclareExerciseEnvironmentTemplate{named}
  {\subsection*{\GetExercisePropertyTF{title}{#1}{??}}}
  {}

\DeclareExerciseEnvironmentTemplate{item}
  {\item}
  {}

\xsimsetup{
  exercise/template = named
}

\DeclareExerciseCollection{exercise-pool}

\begin{filecontents*}{\jobname-exercises.tex}
\begin{question}
  Who is the Defence Minister?
\end{question}
\begin{question}
  Who is the Home Minister?
\end{question}
\begin{question}
  Who is the Finance Minister?
\end{question}
\begin{question}
  Who is the External Affairs Minister?
\end{question}
\end{filecontents*}

\begin{document}

\collectexercises{exercise-pool}
\input{\jobname-exercises.tex}
\collectexercisesstop{exercise-pool}

\begin{exercise}[title=Answer the following in one sentence:]
  \begin{enumerate}
    \item Who is the President?
    \item Who is the Prime Minister?
    \printrandomexercises[collection=exercise-pool]{2}
  \end{enumerate}
\end{exercise}

\end{document}

---

PS: the code requires xsim v0.10 which at the time of writing (2017-09-18 14:57 CEST) is not yet available but is on its way to CTAN (and the popular distributions).