Match the correct formula and shape of the central atom. Which pair is correct?

Question

$\begin{array}{1 1}(a)\;CS_2,bent&(b)\;CO_3^{2-}, trigonal\; pyramidal\\(c)\; SiH_3^-, trigonal\; planar&(d)\; CMe_3^+, trigonal \;planar\end{array}$