Which one of the following is incorrect about the activities associated with PS-I and PS-II in non-cyclic photophospho-rylation? (a) Water is oxidised in PS - II, but not in PS - I. (b) Photons (light) are needed to activate both PS - I and PS - II. (c) Photolysis of water, formation of ATP + NADPH + H occur. (d) Production of NADPH + H+ is associated with PS - II, but not with PS - I.