Choose the selection which correctly characterizes all three of the following substances in terms of whether they are polar or nonpolar:
IF and NCl3 and SiF4
a) IF is polar and NCl3 is nonpolar and SiF4 is nonpolar.
b) IF is nonpolar and NCl3 is polar and SiF4 is polar.
c) IF is polar and NCl3 is nonpolar and SiF4 is polar.
d) IF is nonpolar and NCl3 is polar and SiF4 is nonpolar.
e) IF is polar and NCl3 is polar and SiF4 is nonpolar.