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CBSE 2025 · Region 1 · Set 2 · Q9 · 1 mark

Let $\displaystyle A$ be a matrix of order $\displaystyle m \times n$ and $\displaystyle B$ is a matrix such that $\displaystyle A^{T} B$ and $\displaystyle B A^{T}$ are defined. Then, the order of B is :

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