Let Xa n dY be two arbitrary, 3xx3 , non...

Let `Xa n dY` be two arbitrary, `3xx3` , non-zero, skew-symmetric matrices and `Z` be an arbitrary `3xx3` , non-zero, symmetric matrix. Then which of the following matrices is (are) skew symmetric? a.`Y^3Z^4 Z^4Y^3` b. `x^(44)+Y^(44)` c. `X^4Z^3-Z^3X^4` d. `X^(23)+Y^(23)`

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