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\documentclass[svgnames]{webquiz}
\usepackage{pst-all}
\newcommand\C{\mathbb{C}}
\title{A pstricks example}
\begin{document}
\begin{question}
The shaded region in the graph
\begin{center}
\begin{pspicture}[unit=0.6cm](-3,-1.5)(3,4)
\pscircle[linewidth=1pt,linestyle=dashed,
fillcolor=SkyBlue,fillstyle=solid](1,1){2}
\psaxes[linecolor=red,linewidth=1pt,labels=none]
{->}(0,0)(-1.5,-1.5)(3.5,3.5)
\rput(3.75,0){$x$} \rput(0,3.85){$iy$}
\rput(3,-0.4){3} \rput(-0.4,3){3$i$}
\psdots(1,1)
\end{pspicture}
\end{center}
is equal to which of the following sets of complex numbers?
\begin{choice}[columns=2]
\incorrect $\{z \in \C : (z-1)^{2}+(z-(i+1))^{2}<2\}$
\incorrect $\{z \in \C : z+(i+1)<2\}$
\correct $\{z \in \C : |z-(i+1)|<2\}$
\incorrect None of the above.
\end{choice}
\end{question}
\end{document}
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