\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
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Which of the following matrix products is possible?
\(\begin{pmatrix}1&2\\3&4\end{pmatrix} \times \begin{pmatrix}5\end{pmatrix}\)
\(\begin{pmatrix}1&2&3&4\end{pmatrix} \times \begin{pmatrix}5\\6\\7\\8\end{pmatrix}\)
\(\begin{pmatrix}1&2\end{pmatrix} \times \begin{pmatrix}3&4\end{pmatrix}\)
\(\begin{pmatrix}1\\2\end{pmatrix} \times \begin{pmatrix}3\\4\end{pmatrix}\)
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