Which of the following molecules is a polar molecule?

Step-by-step solution

A polar molecular is a molecular containing polar bonds, where the sum of all the bonds dipole moment is not zero. In case of H 2 O , the bonds are inclined at an angle, so the net dipole moment is non-zero. Hence, H 2 O is a polar molecule while in all other cases the dipole moment are balanced, so the net moment is zero.