1.

The rank of the matrix \(\begin{bmatrix} 5 & 0 & -5 & 0 \\\ 0 & 2 & 0 & 1 \\\ -5 & 0 & 5 & 0 \\\ 0 & 1 & 0 & 2 \end{bmatrix}\) is

A. 1
B. 2
C. 3
D. 4
Answer» D. 4


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