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If a=[a(ij)] is a square matrix of order...

If `a=[a_(ij)]` is a square matrix of order 2 such that `a_(ij)={(1, when &emsp,i ne j), (0, when &emsp, i = j):}`, then `A^2` is

A

`[[1, 0], [1, 0]]_(2 times 2)`

B

`[[1, 1], [0, 0]]_(2 times 2)`

C

`[[1, 1], [1, 0]]_(2 times 2)`

D

`[[1, 0], [0, 1]]_(2 times 2)`

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