\documentclass{article}
\usepackage{amsmath,amssymb,amsthm}
\usepackage{graphicx}
\usepackage{tkz-graph}
\usepackage{xepersian}
\settextfont[Scale=1.15]{HM XNiloofar}

%\tracingall
%\theoremstyle{definition}

\theoremstyle{definition}
\newtheorem{question}{سوال}

\def\choices#1#2
	{%
		\setcounter{enumi}{0}%
		\renewcommand\theenumi{#2{enumi}}
		\dimen1 \linewidth
		\divide\dimen1 by #1\relax
		\def\choice
			{
				\newline\hfil\egroup\penalty 50 \hfill
				\refstepcounter{enumi}%
				\leavevmode\hbox to \dimen1 \bgroup\makebox[1cm][l]{\theenumi)}
			}
		\leavevmode\bgroup\hskip 0pt plus -1fill
	}

\def\endchoices{\hfil\egroup}

\begin{document}
\begin{question}
نمونه‌ای از سوالهای چند گزینه‌ای فقط با فرمول ریاضی ساده
    \begin{choices}{4}{\arabic}
    \choice $\dfrac{x}{|x|}$
    \choice $\dfrac{|-x|}{-x}$
    \choice $|x|-|-x|$
    \end{choices}
\end{question}

\begin{question}
نمونه‌ای با فرمول ریاضی پیچیده و شکل و حتی گراف
    \begin{choices}{2}{\arabic}
    \choice
    	{ فرمول
$
\displaystyle
    			f=
				\left\{
						\begin{aligned}
							0 \quad & \operatorname{Re} \{ z\}  > 0 \hfill \\
							\pi \quad & \operatorname{Re} \{ z\}  < 0 \hfill \\
							\frac{\pi }{2} \quad & \operatorname{Re} \{ z\}  = 0\hfill
						\end{aligned}
				\right.
$
		}
\choice	
		{ شکل
          	\includegraphics[scale=0.5]{img.jpg}
		}
    \choice
		{ گراف
		   \begin{tikzpicture}[scale=0.2,rotate=180]
				\def\vx{0};
				\def\vy{0};
				\node [circle,scale=0.3,draw=black,color=black,fill=white,line width=1] (1) at (8.96 , 0.93 ) {}; % {$V1$};
       			\node [circle,scale=0.3,draw=black,color=black,fill=white,line width=1] (2) at (11.74 , 3.72 ) {}; % {$V2$};
				\node [circle,scale=0.3,draw=black,color=black,fill=white,line width=1] (3) at (8.96 , 6.51 ) {}; % {$V3$};
       			\node [circle,scale=0.3,draw=black,color=black,fill=white,line width=1] (4) at (6.17 , 3.72 ) {}; % {$V4$};
		        \draw [color=black,line width=1pt] (1) to (2) ;
		        \draw [color=black,line width=1pt] (2) to (3) ;
		        \draw [color=black,line width=1pt] (3) to (4) ;
		        \draw [color=black,line width=1pt] (4) to (1) ;
		   \end{tikzpicture}
		}
	\choice برای هر مقدار $x$
    \end{choices}
\end{question}
\end{document}
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