Which one is a polar molecule?

Match the following molecules in List-$I$ with their respective dipole moments in List-$II$:
| List-$I$ (Molecules) | List-$II$ (Dipole moment $\mu$,$D$) |
| :--- | :--- |
| $A. \ H_2O$ | $I. \ 0$ |
| $B. \ BF_3$ | $II. \ 0.23$ |
| $C. \ NH_3$ | $III. \ 1.47$ |
| $D. \ NF_3$ | $IV. \ 1.85$ |

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

The number of non-polar molecules from the following is . . . . . . $HF, H_2O, SO_2, H_2, CO_2, CH_4, NH_3, HCl, CHCl_3, BF_3$

Which molecule does not show zero dipole moment?

Which compound among the following has the highest dipole moment?