CH4 and SiF4 are examples of tetrahedral geometry. Which of the following ... ...

CH4 and SiF4 are examples of tetrahedral geometry. Which of the following are true regarding these two molecules?   I. The carbon-hydrogen bonds are dipoles II. The silicon-fluorine bonds are dipoles III. Methane is nonpolar IV. SiF4 has zero dipole moment  
(A) I & II only
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in 05. Chemical Bonding