Polarity of Bonds and Properties of Nitrogen Molecule (N₂)

Which of the following bonds is the most polar? A polar bond is determined by the difference in electronegativity between the two atoms. Use the electronegativity values to determine which bond is most polar.

Which of the following statements is/are true about the nitrogen diatomic molecule ($\mathrm{N_2}$)? I. It has polar covalent bonds. II. It has a bond order of 3. III. Each atom has a full octet of electrons in its valence shell.