Which of the Following Types of Molecules Always Has a Dipole

Multiple Choice

Which of the following types of molecules always has a dipole moment?

A) Linear molecules with two identical bonds.
B) Tetrahedral molecules (four identical bonds equally spaced) .
C) Trigonal pyramid molecules (three identical bonds) .
D) Trigonal planar molecules (three identical bonds equally spaced) .
E) None has a dipole moment.