(c)
[image:4_image174.emf]
Total number = 4$\longrightarrow sp^{3}$hybridisation
[image:4_image175.emf]
Total number = 5$\longrightarrow sp^{3\ }d$ hybridisation
[image:4_image176.emf]
Total number = 6$\longrightarrow sp^{3\ }d^{2}$ hybridisation