Molecular shaper of SF4 , CF4 , XeF4 are
(a) the same with 1, 1 and 1 lone pairs of electrons respectively
(b) different with 1, 0 and 2 lone pairs of electrons respectively
(c) different with 0, 1 and 2 lone pairs of electrons respectively
(d) different with 2, 0 and 1 lone pairs of electrons respectively