The electron transport chain of the photosynthetic process is:

The light phase of photosynthesis is called

Assertion $(A) : H^+$ gradient across the thylakoid membrane is essential for the formation of $\text{ATP}$.
Reason $(R) :$ Breakdown of $H^+$ gradient due to the movement of protons through $F_0$ of $\text{ATP}$ synthase releases enough energy to activate $\text{ATP}$ synthase enzyme that catalyses the formation of $\text{ATP}$.

In photosynthesis, which phase involves the following phenomena?
$(I)$ Water is split $(photolysis)$
$(II)$ Oxygen is liberated
$(III)$ $NADPH$ is formed

Assertion $(A) :-$ The whole scheme of transfer of electrons starting from $PS-II$ to $NADP^{+}$ is called $Z-scheme$.
Reason $(R) :-$ When all the carriers of this scheme are placed in sequence on a redox potential scale,they appear like $Z$.
In the light of the above statements,choose the correct answer from the options given below:

The result$(s)$ of the light reaction is/are: