If $X_{4 \times 3}$, $Y_{4 \times 3}$ and $P_{2 \times 3}$ are matrices, then the order of the matrix $\left[P(X^T Y)^{-1} P^T\right]^T$ is
- A$4 \times 3$
- B$3 \times 4$
- C$3 \times 3$
- D$2 \times 2$
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