Which of the following is a polar compound?

Which of the following has the highest dipole moment?

Which of the following has the highest dipole moment?

Identify the option in which the molecules are arranged in the correct order of their dipole moments.

Given below are two statements:
Statement-$I$: Since fluorine is more electronegative than nitrogen,the net dipole moment of $NF_3$ is greater than $NH_3$.
Statement-$II$: In $NH_3$,the orbital dipole due to lone pair and the dipole moment of $N-H$ bonds are in opposite direction,but in $NF_3$ the orbital dipole due to lone pair and dipole moments of $N-F$ bonds are in same direction.
In the light of the above statements,choose the most appropriate from the options given below.

Which molecule is polar?