\textbf{149.} If $A$ is the adjacency matrix of graph $G$, and the entries in row $\hat{n}$ and column $\hat{n}$ of matrix $A^2$ are $«4,4,2,2,2»$, then graph $G$ has how many cycles?
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(1) $3$ \hfill (2) $4$ \hfill (3) $5$ \hfill (4) $6$
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