Which pigment system eventually donates electrons for the reduction of $NADP^+$?

Chemiosmosis requires:
$I$. $A$ membrane
$II$. $A$ proton pump
$III$. $A$ proton gradient
Select the correct option.

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.

Assimilatory power refers to

In the chloroplast,the site for oxygen production and photosynthetic phosphorylation is ......... .

Pigment system-$I$ $(PS-I)$ conducts: