Which of the following molecules is polar?

Name: Which of the following molecules is polar?
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Question

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NH3 is a polar molecule due to the difference in electronegativity between the nitrogen and hydrogen atoms, leading to a partial negative charge on the nitrogen and partial positive charges on the hydrogens. The other molecules listed are either nonpolar or have symmetrical arrangements of polar bonds that cancel out the overall polarity.

Which of the Following Molecules Is Polar