A loop, made of straight edges has six corners at A(0,0,0), B(L,O,0) C(L,L,0), D(0,L,0) E(0,L,L) and F(0,0,L). A magnetic field B = Bo (i + k)T is present in the region. The flux passing through the loop ABCDEFA (in that order) is (a) Bo L2 Wb. (b) 2 Bo L2 Wb. (c) 2 Bo L2 Wb. (d) 4 Bo L2 Wb.