Which of the following statements is incorrect for a square matrix $A$ where $|A| \neq 0$?
- AIf $A$ is a diagonal matrix,$A^{-1}$ will also be a diagonal matrix.
- BIf $A$ is a symmetric matrix,$A^{-1}$ will also be a symmetric matrix.
- CIf $A^{-1} = A$,then $A$ is an idempotent matrix.
- DIf $A^{-1} = A$,then $A$ is an involutory matrix.
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