If A = \(\left[ {\begin{array}{*{20}{c}} {\rm{0}}&{\rm{1}}\\ {\rm{1}}&{\rm{0}} \end{array}} \right]\) and B = \(\left[ {\begin{array}{*{20}{c}} {\rm{0}}&{\rm{-i}}\\ {\rm{i}}&{\rm{0}} \end{array}} \right]\), then (A + B) (A + B) is equal to
1
A2 - B2
2
A2 + B2
3
A2 - B2 + BA + AB
4
None of these