Which of the following processes involves the conversion of light energy into chemical energy?

Which of the following statements with regard to photosynthesis is/are correct?
$I$. In $C_{4}$-plants,the primary $CO_{2}$ acceptor is $PEP$.
$II$. In the photosynthetic process,$PS-II$ absorbs energy at or just below $680 \;nm$.
$III$. The pigment that is present in the Pigment System-$I$ is $P680$.

Name the two important enzymes of $C_3$ and $C_4$ pathways, respectively. What important role do they play in fixing $CO_2$?

Which of the following processes is never affected by light in a vegetable garden?

Select the correct match.

Column-$I$	Column-$II$
$a.$ $OEC$	$(i)$ Primary e-acceptor
$b.$ $NADP$ reductase	$(ii)$ Photolysis of $H_2O$
$c.$ Succinyl $CoA$	$(iii)$ Outer surface of thylakoid membrane
$d.$ Phaeophytin	$(iv)$ Chlorophyll synthesis

Suppose $Euphorbia$ and $Maize$ are grown in a tropical area. Which one of them do you think will be able to survive better under such conditions?