How does a polar covalent bond differ from a nonpolar covalent bond?

In a polar bond, electrons are shared unequally.

In a polar bond, electrons are transferred.

A polar bond only occurs with atoms of the same element.

A polar bond is always stronger.

A nonpolar covalent bond occurs when electrons are shared equally between two atoms.

A nonpolar covalent bond occurs between atoms with similar electronegativities.

In a nonpolar bond, there is no separation of charge and the bond is symmetrical.

A nonpolar covalent bond is generally weaker than a polar covalent bond.

so is it a b c or d

Based on the information provided, the correct answer would be:

A) A polar bond occurs when electrons are shared unequally.