Correct order of dipole moment for the following molecules is

$(a)\;I =II \\ (b)\;I < II \\(c)\;I > II \\(d)\;I < < II$

$\theta < 60^{\circ}$ due to intramolecular H-bond.
$\theta > 60^{\circ}$ due to dipole - dipole repulsion.
Now, $\mu \alpha \large\frac{1}{\theta}$
ie lesser the angle , higher the dipole moment.
Hence c is the correct answer.