% !TeX encoding = UTF-8
% !TeX spellcheck = en_US
% !TEX TS-program = lualatex
\documentclass{article}
\usepackage[nostamp]{moodle}
\ifPDFTeX % FOR LATEX and PDFLATEX
	\usepackage[utf8]{inputenc} % necessary
	\usepackage[T1]{fontenc} % necessary
\else % assuming XELATEX or LUALATEX
	\usepackage{fontspec}
\fi

\begin{document}

\section*{Introduction}

This document is intended to check the support of the command 
\verb|\htmlonly{...}|.

\begin{quiz}{HTML Only}

\begin{multi}{HTML code}
A \htmlonly[place holder]{<a href="www.com">$_`'</a>} %%,#,\ breaking 
%compilation
\item \htmlonly[\fbox{PDF contents}]{<div style="border: 1px solid green; 
display: inline-block;">HTML contents</div>}
\item C
\item* D
\end{multi}

\end{quiz}

\end{document}