Question

If a bonding pair of electrons is unequally shared between two atoms, the bond is

Answer 1

The answer is D. And if it is equally shared it is nonpolar covalent bond

Answer 2

A Polar Covalent Bond is created when the shared electrons between atoms are not equally shared. This occurs when one atom has a higher electronegativity than the atom it is sharing with.

Hope I helped  :}

-Bucky