The dipole moment order of which of the following pairs of molecules is not correct?

Which of the following molecules has a zero dipole moment?

For which molecules among the following,the resultant dipole moment $(\mu) \neq 0?$

Which of the following substances has the lowest dipole moment?

Bond distance in $HF$ is $9.17 \times 10^{-11} \ m$. Dipole moment of $HF$ is $6.104 \times 10^{-30} \ Cm$. The percentage ionic character in $HF$ will be : .............. $\%$
(electron charge $= 1.60 \times 10^{-19} \ C$)

The $ICl$ molecule is