What is the hybridisation of central metal ion and shape of Wilkinson’s catalyst ?

Question

$\begin{array}{1 1} (a)\;\text{$dsp^3$ hybridization and square planar shape}\\ (b)\;\text{ $dsp^2$ hybridization and square planar shape} \\(c)\;\text{$dsp^2$ hybridization and tetrahedral shape}\\(d)\;\text{$sp^2$ hybridization and trigonal shape} \end{array}$