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=B_o( hati +hat k)T` is present in the region. The flux passing through the loop ABCDEFA (in that order) is
Options:
(a) `B_o L^2` Wb.
(b) `B_o L^2` Wb..
(c) `sqrt2B_o L^2` Wb.
(d) 4`B_o L^2` Wb.