Classify each of the three bonds P - H , Be - F and N - F as ionic , polar covalent or non-polar .
a. P - H is non-polar , Be - F is polar covalent and N - F is ionic
b. P - H is non-polar , Be - F is ionic and N - F is polar covalent
c. P - H is polar covalent , Be - F is ionic and N - F is non-polar
d. P - H is ionic , Be - F is polar covalent and N - F is non-polar