The figure shows an instantaneous profile of a rope carrying a progressive wave moving from left to right then

The figure shows an instantaneous profile of a rope carrying a progressive wave moving from left to right then The figure shows an instantaneous profile of a rope carrying a progressive wave moving from left to right, then (a) the phase at A is greater than the phase at (b) the phase at B is greater than the phase at l' (c) A is moving upwards (d) B is moving upwards