A square surface of side `L` metre in the plane of the paper is placed in a uniform electric field `E ("volt"//m)` acting along the same place at an anlge `theta` with the horizontal side of the square as shown in figure. The electric flux linked to the surface in uint of `V-m` is
A. `EL^(2)`
B. `EL^(2)cos theta`
C. `EL^(2)sin theta`
D. 0