During non-cyclic photophosphorylation, when electrons are lost from the reaction centre at PSII , what is the source which replaces these electrons?

Step-by-step solution

Photolysis of water: It is a light-mediated oxidation process associated with PSII characterized by the splitting of a water molecules into electrons, hydrogen ions and oxygen. The electrons released during photolysis are accepted by P 680 of PSII , which has lost its electron due to excitation. The H + ions released are used to reduce NADP to NADPH + H + that enters the dark reaction of photosynthesis. The reaction is as follows: 2 H 2 O → Mn + 2 ,   Ca + 2 ,   Cl - Sunlinght   O 2 + 4 H + + 4