The electronegativity difference between N and F is greater than that between N and H yet the dipole moment of$NH_3$ (1.5 D) is larger than that of$NF_$3 (0.2 D). This is because:-

Question

( A ) In $NH_3$ as well as in $NF_3$ the atomic dipole and bond dipole are in the same direction
( B ) In $NH_3$ the atomic dipole and bond dipole are in the opposite directions whereas in $NF_3$ these are in the same direction
( C ) In $NH_3$ the atomic dipole and bond dipole are in the same direction whereas in $NF_3$ these are in opposite directions
( D ) In $NH_3$ as well as $NF_3$ the atomic dipole and bond dipole are in opposite directions