Which of the following has a molecular structure best described as involving an "incomplete octet"?

Question

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BF3 has a molecular structure best described as involving an "incomplete octet". Boron has three valence electrons, and each fluorine atom has one valence electron. The three fluorine atoms share their valence electrons with boron, forming three covalent bonds. However, boron only has six valence electrons, so it does not have a complete octet of electrons.

Which of the Following Has a Molecular Structure Best Described