If A = ([2,1],[1,2]), then A (Adj A) equ...

If `A = ([2,1],[1,2])`, then `A (Adj A)` equals :

A

`([3,0],[0,3])`

B

`([0,3],[3,0])`

C

`([1,3],[3,1])`

D

`([3,1],[1,3])`

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