问题
以下哪个矩阵是反对称矩阵?选项
[A]. $\left(\begin{array}{ccc} 0 & 2 & 0 \\ 1 & 0 & 2 \\ 0 & 1 & 0 \end{array}\right)$[B]. $\left(\begin{array}{ccc} 0 & -2 & 0 \\ 2 & 0 & 7 \\ 0 & -7 & 0 \end{array}\right)$
[C]. $\left(\begin{array}{ccc} 3 & 2 & 3 \\ 1 & 0 & 1 \\ 6 & 2 & 6 \end{array}\right)$
[D]. $\left(\begin{array}{ccc} 1 & 2 & 0 \\ -2 & 0 & 2 \\ 0 & -2 & 0 \end{array}\right)$