# GATE2020: GA: 9

For a matrix $M=[m_{ij}]; \: i,j=1,2,3,4$, the diagonal elements are all zero and $m_{ij}=-m_{ji}$. The minimum number of elements required to fully specify the matrix is ________

1. $0$
2. $6$
3. $12$
4. $16$

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## Related questions

1
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2
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