Protons $(H^+)$ move from the thylakoid lumen to the stroma through which of the following?

$ATP$ formation in photosynthesis is known as

$P_{680}$ is associated with:

Read the following four statements,$(i), (ii), (iii)$ and $(iv)$ and select the right option having both correct statements.
Statements:
$(i)$ $Z$ scheme of light reaction takes place in the presence of $PSI$ only.
$(ii)$ Only $PSI$ is functional in cyclic photophosphorylation.
$(iii)$ Cyclic photophosphorylation results in the synthesis of $ATP$ and $NADPH_2$.
$(iv)$ Stroma lamellae lack $PSII$ as well as $NADP$ reductase.

Which of the following is formed during the light reaction of photosynthesis?

The process of photophosphorylation was discovered by