\documentclass[12pt]{jsarticle}
\usepackage{amsmath,amssymb}
\pagestyle{empty}
\begin{document}
\setlength{\baselineskip}{22pt}
\begin{flushleft}
{\huge 4}
\begin{description}
\item[(1)]
\item[(2)]
\item[(3)]
\end{description}
\end{flushleft}
\end{document}
