The possible set of eigen values of a 4*4 skew-symmetric orthogonal re – McqOptions

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1.	The possible set of eigen values of a 4*4 skew-symmetric orthogonal real matrix is
A.	{±i}
B.	{±i, ±1}
C.	{±1}
D.	{0 , ±i}
Answer» B. {±i, ±1}

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