\documentclass {article}


\usepackage{graphicx}
\usepackage{wrapfig}
\usepackage[version=4]{mhchem}
\usepackage{expl3}
\usepackage{calc}

\usepackage{multirow}

\usepackage{multicol,color}
\definecolor{mycolor}{rgb}{0,0,0}
\newcounter{question}
\newenvironment{mcquestions}{\begin{itemize}}{\end{itemize}}
\newcommand{\question}[1]{\stepcounter{question}\item[\textcolor{mycolor}{\thequestion.}] #1}
\newsavebox{\answera}
\newsavebox{\answerb}
\newsavebox{\answerc}
\newsavebox{\answerd}
\newcommand{\answer}[4]{%
\sbox\answera{#1}%
\sbox\answerb{#2}%
\sbox\answerc{#3}%
\sbox\answerd{#4}%
\ifdim\wd\answera<0.135\textwidth%
\ifdim\wd\answerb<0.135\textwidth%
\ifdim\wd\answerc<0.135\textwidth%
\ifdim\wd\answerd<0.135\textwidth%
\begin{multicols}{4}
\begin{itemize}
\item[\textcolor{mycolor}{1)}] \usebox{\answera}
\item[\textcolor{mycolor}{2)}] \usebox{\answerb}
\item[\textcolor{mycolor}{3)}] \usebox{\answerc}
\item[\textcolor{mycolor}{4)}] \usebox{\answerd}
\end{itemize}
\end{multicols}
\else%
\ifdim\wd\answera<0.4\textwidth%
\ifdim\wd\answerb<0.4\textwidth%
\ifdim\wd\answerc<0.4\textwidth%
\ifdim\wd\answerd<0.4\textwidth%
\begin{multicols}{2}
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\item[\textcolor{mycolor}{1)}] \usebox{\answera}
\item[\textcolor{mycolor}{3)}] \usebox{\answerc}
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\item[\textcolor{mycolor}{4)}] \usebox{\answerd}
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\item[\textcolor{mycolor}{1)}] #1
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\item[\textcolor{mycolor}{4)}] #4
\end{itemize}
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\item[\textcolor{mycolor}{1)}] #1
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\item[\textcolor{mycolor}{4)}] #4
\end{itemize}
\fi\fi
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\ifdim\wd\answera<0.4\textwidth%
\ifdim\wd\answerb<0.4\textwidth%
\ifdim\wd\answerc<0.4\textwidth%
\ifdim\wd\answerd<0.4\textwidth%
\begin{multicols}{2}
\begin{itemize}
\item[\textcolor{mycolor}{1)}] \usebox{\answera}
\item[\textcolor{mycolor}{3)}] \usebox{\answerc}
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\item[\textcolor{mycolor}{4)}] \usebox{\answerd}
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\begin{itemize}
\item[\textcolor{mycolor}{1)}] #1
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\item[\textcolor{mycolor}{3)}] #3
\item[\textcolor{mycolor}{4)}] #4
\end{itemize}
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\begin{itemize}
\item[\textcolor{mycolor}{1)}] #1
\item[\textcolor{mycolor}{2)}] #2
\item[\textcolor{mycolor}{3)}] #3
\item[\textcolor{mycolor}{4)}] #4
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\item[\textcolor{mycolor}{4)}] #4
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\ifdim\wd\answera<0.4\textwidth%
\ifdim\wd\answerb<0.4\textwidth%
\ifdim\wd\answerc<0.4\textwidth%
\ifdim\wd\answerd<0.4\textwidth%
\begin{multicols}{2}
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\item[\textcolor{mycolor}{3)}] \usebox{\answerc}
\item[\textcolor{mycolor}{2)}] \usebox{\answerb}
\item[\textcolor{mycolor}{4)}] \usebox{\answerd}
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\item[\textcolor{mycolor}{4)}] #4
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\item[\textcolor{mycolor}{1)}] #1
\item[\textcolor{mycolor}{2)}] #2
\item[\textcolor{mycolor}{3)}] #3
\item[\textcolor{mycolor}{4)}] #4
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\begin{itemize}
\item[\textcolor{mycolor}{1)}] #1
\item[\textcolor{mycolor}{2)}] #2
\item[\textcolor{mycolor}{3)}] #3
\item[\textcolor{mycolor}{4)}] #4
\end{itemize}
\fi\fi
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\ifdim\wd\answera<0.4\textwidth%
\ifdim\wd\answerb<0.4\textwidth%
\ifdim\wd\answerc<0.4\textwidth%
\ifdim\wd\answerd<0.4\textwidth%
\begin{multicols}{2}
\begin{itemize}
\item[\textcolor{mycolor}{1)}] \usebox{\answera}
\item[\textcolor{mycolor}{3)}] \usebox{\answerc}
\item[\textcolor{mycolor}{2)}] \usebox{\answerb}
\item[\textcolor{mycolor}{4)}] \usebox{\answerd}
\end{itemize}
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\else
\begin{itemize}
\item[\textcolor{mycolor}{1)}] #1
\item[\textcolor{mycolor}{2)}] #2
\item[\textcolor{mycolor}{3)}] #3
\item[\textcolor{mycolor}{4)}] #4
\end{itemize}
\fi
\else
\begin{itemize}
\item[\textcolor{mycolor}{1)}] #1
\item[\textcolor{mycolor}{2)}] #2
\item[\textcolor{mycolor}{3)}] #3
\item[\textcolor{mycolor}{4)}] #4
\end{itemize}
\fi
\else
\begin{itemize}
\item[\textcolor{mycolor}{1)}] #1
\item[\textcolor{mycolor}{2)}] #2
\item[\textcolor{mycolor}{3)}] #3
\item[\textcolor{mycolor}{4)}] #4
\end{itemize}
\fi
\else
\begin{itemize}
\item[\textcolor{mycolor}{1)}] #1
\item[\textcolor{mycolor}{2)}] #2
\item[\textcolor{mycolor}{3)}] #3
\item[\textcolor{mycolor}{4)}] #4
\end{itemize}
\fi\fi
}
\usepackage{xepersian}
\settextfont{B Nazanin}
\setlatintextfont{Times New Roman}


\begin{document}
\begin{minipage}[c]{0.8\linewidth}
\begin{mcquestions}
\question{%
نتایج تجزیه (برحسب گرم) دو ترکیب مختلف متشکل از فسفر و اکسیژن به صورت زیر است. کدام عبارت درست است؟}
\answer{%



به ازای هرگرم فسفر، نسبت اکسیژن در این دو ترکیب $\frac{B}{A} = \frac{10}{6}$ است.}
{%
تعداد اتم‌های اکسیژن در نمونه B بیش از نمونه A است.}
{%
به ازای هرگرم فسفر، نسبت اکسیژن در این دو ترکیب $\frac{B}{A} = \frac{6}{10}$ است.}
{%
بدون داشتن اوزان اتمی دقیق فسفر و اکسیژن نمی‌توان اظهار نظرکرد.}
\end{mcquestions}
\end{minipage}
\begin{minipage}[c]{0.2\linewidth}
\begin{wraptable}{l}{0.5\linewidth}
	\begin{tabular} {|c|c|c|}
\hline
اکسیژن & فسفر & ترکیب \\ \hline
3/322 & 2/581 & A \\ \hline
2/881 & 3/781 & B \\ \hline
	\end{tabular}
\end{wraptable}
\end{minipage}
\end{document}