AP Police Constable Prelims 6-Jan-2019 Paper

Identify the correct statements related to Z-scheme of light reaction
I) Transfer of electrons starts from PSII
II) The electrons passed down the chain to PSII again
III) The electrons reaches finally downhill to $\mathit{N}\mathit{A}\mathit{D}{\mathit{P}}^{+}$
IV) The electron carriers are not placed in a sequence on a redox potential scale