has dipole moment ‘x’ Debye. Which of the following also has dipole moment ‘x’ Debye

Given , µ = "x"DA)    B) Bond polarity at 2nd and 4th positions nullify each other.Angle between 1st and 3rd positions is 120°.We know Diploe moment =           Dipole moment of 1,2,3,5-tetraflurobenzeneC)  µ = 0D)  Dipole moment                                                   = √3 x