IMAT 2014 Q52 [Molecular Dipoles]

Which two of the following molecular substances in the gaseous state have the strongest permanent molecular dipole?

GeH_4
ICl
SiF_4
CH_2Cl_2
Co_2

A. Co_2 and SiF_4
B. ICl and CH_2Cl_2
C. CH_2Cl_2 and Co_2
D. ICl and Co_2
E. GeH_4 and SiF_4