Hybridization of the molecule is given by the formula,
H = number of orbitals involved in hybridization
V = valence electrons of central atom
M = number of monovalent atoms linked to the central atom
C = charge on the cation
A = charge on the anion
Value of H and hybridization, [H=2(sp),3(sp2),4(sp3),5(sp3d)]
Applying the above formula for given molecules,
Therefore, five molecules have bent shape but have different hybridization.
Hence, the correct answer is 5.