CCl4 is non polar molecule nd non polar molecules has zero dipole moment so here option B is correct.

Explanation:
The dipole moment is the measure of the polarity of a molecule. The polarity of a molecule is mainly influenced by the electronegativity difference between the atoms involved in the bond formation. The greater the difference in electronegativity, the more polar the bond becomes.

Dipole Moment of CCl4:
CCl4 is a tetrahedral molecule with four C-Cl bonds. The dipole moment of each C-Cl bond is equal and opposite, which cancels out each other resulting in a net dipole moment of zero. Therefore, CCl4 has no dipole moment.

Dipole Moment of CHCl3:
CHCl3 is a tetrahedral molecule with three C-Cl bonds and one C-H bond. The C-Cl bond is more polar than the C-H bond due to the difference in electronegativity. The dipole moment of C-Cl bond is towards Cl, and the dipole moment of C-H bond is towards H. The net dipole moment of CHCl3 is the vector sum of all the bond dipole moments, which are not cancelled out. Hence CHCl3 has a dipole moment.

Conclusion:
Therefore, the molecule with the maximum dipole moment is CHCl3.