Question 74Asked in DSSSB TGT Computer Science (Technical), 13 Sep 2025, Shift 3 (5:00 PM)Which of the following options is an example of skew symmetric matrix?
- A[ 3 1 2 ]
[ −1 5 −4 ]
[ 2 4 7 ]
- B[ 0 1 2 ]
[ −1 0 −4 ]
[ −2 4 0 ]
- C[ 0 1 −2 ]
[ −1 0 4 ]
[ 2 4 8 ]
- D[ 3 1 2 ]
[ 1 0 4 ]
[ 2 4 1 ]
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Correct answer: (B) [ 0 1 2 ]
[ −1 0 −4 ]
[ −2 4 0 ]
Explanation
In a skew-symmetric matrix aᵢⱼ = −aⱼᵢ, so the diagonal is all zeros. Option B has a12 = 1, a21 = −1; a13 = 2, a31 = −2; a23 = −4, a32 = 4.