Which of the following is true for photosynthesis?

Assertion : Cyclic pathway of photosynthesis first appeared in some eubacterial species.
Reason : Oxygen started accumulating in the atmosphere after the non-cyclic pathway of photosynthesis evolved.

Water is

Plants in which the first product of $CO_{2}$ fixation is $C_{3}$ acid,i.e.,the ...$A$... pathway,and those in which the first product was $C_{4}$ acid $(OAA)$,i.e.,the ...$B$... pathway. Complete the given statement by filling appropriate options in the given blanks.

Read the given statements and choose the correct option:
< b>Statement-$I$: In Calvin cycle,carboxylation is catalysed by $PEP$ carboxylase.
< b>Statement-$II$: In Hatch-Slack pathway,carboxylation is catalysed by $RuBP$ carboxylase.

In which of the following is light energy stored in the form of chemical energy?