\textbf{210 --} According to the octet rule (Lewis structure), which of the following molecular structures is correct?
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(A) $:\ddot{S}=C=\ddot{O}:$
(B) $:\ddot{O}=C\begin{array}{l} \ddot{C}l: \\ \ddot{C}l: \end{array}$
(P)
$$S\begin{array}{cc} :O: & :O: \end{array}$$
(T)
$$\begin{array}{c} :\ddot{O}: \\ \| \\ H-C-H \end{array}$$
(1) A, B \quad (2) B, P \quad (3) A, T \quad (4) P, T
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