Assume $X, Y, Z, W$ and $P$ are matrices of order $2 \times n, 3 \times k, 2 \times p, n \times 3$ and $p \times k$ respectively. If $n=p,$ then the order of the matrix $7X - 5Z$ is
- A$p \times 2$
- B$p \times n$
- C$n \times 3$
- D$2 \times n$
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