Choose the correct option:
(i) A surface on which the wave disturbance in same phase at all points is called a wavefront.
(ii) The direction of a wave at a point is perpendicular to the wavefront through that point.
(iii) The wavefronts of a wave originating from a point source is spherical.
The wavefronts for a wave going along a fixed direction are planes perpendicular to that direction.