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let A ={{:({:(a(11),a(12)),(a(21),a(22))...

let A `={{:({:(a_(11),a_(12)),(a_(21),a_(22)):}):a_(ij){0,1,2} and a_(11)=a_(22)}`
then the number of singular matrices in set A is

A

27

B

24

C

10

D

20

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The correct Answer is:
D
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