The correct order of hybridisation of the central atom in the following species ` NH_3 ,[PtCl_4 ]^(2-) , PCl_5` and ` BCl_3` is :
A. `dsp^(2), dsp^(3) sp^(2) and sp^(3)`
B. `sp^(3), dsp^(2) sp^(2)d and sp^(2)`
C. `dsp^(2), sp^(2), sp^(3) dp^(3)`
D. `dsp^(2), sp^(3), sp^(2) dsp^(3)`