If A = [aij] is a square matrix of order 2 such that aij = 1, when i ≠ j and aij = 0, when i = j, then A2 is
1
\(\left[ {\begin{array}{*{20}{c}} 1&0\\ 1&0 \end{array}} \right] \)
2
\(\left[ {\begin{array}{*{20}{c}} 1&1\\ 0&0 \end{array}} \right] \)
3
\(\left[ {\begin{array}{*{20}{c}} 1&1\\ 1&0 \end{array}} \right] \)
4
\(\left[ {\begin{array}{*{20}{c}} 1&0\\ 0&1 \end{array}} \right] \)