Convert (in not more than 3 steps)
[IIT, 2003]
\begin{matrix} \overset{\text {Cone.}}{\underset{H_2SO_4}{\xrightarrow {\hspace{2 cm}} }} \\\\\\\\\ \end{matrix}
\begin{matrix} \overset{KHF_2}{\underset{\text {Fusion}}{\xrightarrow {\hspace{2 cm}} }} \\\\\\\\\ \end{matrix}