\documentclass[a4paper,12pt,openany,oneside,msc]{VThesis}
\usepackage{graphicx}
\usepackage{tikz}
\usepackage[extrafootnotefeatures]{xepersian}
\settextfont[Scale=1.2]{XB Yas}
\begin{document}
\baselineskip=1cm
\pagenumbering{alph}
\begin{tikzpicture}
\node {$a$}
child {node {$b$}
child {node {$c$}}
}
child {node {$m$}}
child {node {$d$}
child {node {$e$}}
};
\end{tikzpicture}
\qquad 
\begin{tikzpicture}
\node {a}
child {node {$q$}
child {node {$w$}}
child[missing] {node {l}}
child {node {$f$}}
}
child {node {$g$}}
child {node {$h$}};
\end{tikzpicture}



\end{document}