Which of the following has zero dipole moment value?

1) The chlorine atoms in the   structure is arranged in a single plane with 120-degree bonds between each of the three links. Net dipole moment is therefore zero.
2) Since, in trigonal bipyramidal (TBP) Geometry ,axial orbital has no s-character. So, F and $-{\mathrm{CF}}_3$ group are attached at equatorial positions. Therefore, dipole moment of $\mathrm{P}{\left({\mathrm{CH}}_3\right)}_2{\left({\mathrm{CF}}_3\right)}_2$is zero.

3) Due to its symmetrical geometrical structure, which causes the polarity of the P-Cl bonds to be cancelled out by one another, is nonpolar in nature. Therefore, the net dipole moment of equals zero.