Z-scheme is another name used for:

Explanation

The 'Z-scheme' refers to the process of non-cyclic photophosphorylation in the light-dependent reactions of photosynthesis. This process involves the transfer of electrons from water through Photosystem II and Photosystem I, resulting in the production of ATP and NADPH. The pathway of electron flow resembles the shape of the letter 'Z' when plotted on an energy diagram, hence the term 'Z-scheme.' Cyclic photophosphorylation is incorrect because it involves a circular electron flow involving only Photosystem I and does not produce NADPH. The Calvin cycle is incorrect as it pertains to the light-independent reactions where carbon fixation occurs. Oxidative photophosphorylation is a term more commonly associated with ATP production in mitochondria during respiration rather than photosynthesis.