The given figure illustrates the passage of the ordinary and extra ordinary wavefronts O and E through a uniaxial crystal. The figure represents crystal orientation with its:
(a) optic axis in the plane of incidence and parallel to the crystal surface
(b) optic axis perpendicular to the plane of incidence and parallel to the crystal surface
(c) optic axis in the plane of incidence and perpendicular to the crystal surface
(d) optic axis perpendicular to the plane of incidence and perpendicular to the crystal surface