The figure shows a glass plate placed vertically on a horizontal table. $A$ beam of unpolarised light falls on its surface at the polarising angle of $57^\circ$ with the normal. The electric vector in the reflected light on screen $S$ will vibrate with respect to the plane of incidence in a:

• A
  Vertical plane
• B
  Horizontal plane
• C
  Plane making an angle of $45^\circ$ with the vertical
• D
  Plane making an angle of $57^\circ$ with the horizontal