$\begin{array}{1 1}(a)\;SO_2-Angular,sp^2,SO_3-trigonal\;planar,sp^2&(b)\;\;SO_3-Angular,sp^2,SO_3-trigonal\;planar,sp^2\\(c)\;SO_2-linear\;sp,SO_3-trigonal\;planar,sp^2&(d)\;SO_2-SP^3,pyramid,SO_3-sp^2,linear\end{array}$
