Which of the following molecules has a dipole moment?

Question

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In order to have a dipole moment, a molecule must have a separation of charge, or partial charges on the atoms. The molecule in choice B (11ea7ca1_4b34_5168_9d3f_edba83df27ab_TB4938_00) has a polar covalent bond between the oxygen and hydrogen, which leads to a separation of charge and a dipole moment. The other molecules do not have polar covalent bonds, and therefore do not have dipole moments.

Which of the Following Molecules Has a Dipole Moment