Assertion : Cyclic photophosphorylation synthesises ATP. Reason : ATP synthesis in cyclic photophosphorylation is associated with NADPH formation.

In case of cyclic photophosphorylation, the electron while passing between ferredoxin and plastoquinone and/or over the cytochrome complex, loses sufficient energy to form ATP from ADP and inorganic phosphate. In cyclic photophosphorylation no NADPH formation takes place. But in case of noncyclic photophosphorylation, NADP - reduced through $\mathrm{H}^{+}$released during photolysis forms NADPH. ATP synthesis is not direct and the energy released by electron is actually used for pumping $\mathrm{H}^{+}$ions across the thylakoid membrane. It creates a proton gradient. The gradient triggers the coupling factor to synthesise ATP from ADP and inorganic phosphate.