(A) In $OF_4$,the oxidation state of oxygen would be $+4$. Oxygen is the second most electronegative element and typically exhibits oxidation states o

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(A) In $OF_4$,the oxidation state of oxygen would be $+4$. Oxygen is the second most electronegative element and typically exhibits oxidation states of $-2, -1, +1$,and $+2$. Since oxygen cannot expand its octet due to the absence of $d$-orbitals,it cannot achieve a $+4$ oxidation state. Therefore,$OF_4$ is not a theoretically possible molecule.