Which of the following is a unique event that provides the basis for life on this planet?

$A-$ In chloroplast,the membrane system is responsible for trapping the light energy and also for the synthesis of $ATP$ and $NADPH$. This is called the light reaction.
$R-$ In the stroma,enzymatic reactions incorporate $CO_2$ into the plant,leading to the synthesis of sugar.

Green plants and green sulphur bacteria,which prepare their organic food themselves with the help of sunlight,are known as:

Assertion : $C_4$ photosynthetic pathway is more efficient than the $C_3$ pathway.
Reason : Photorespiration is suppressed in $C_4$ plants.

Assertion: Bacterial photosynthesis occurs by utilizing wavelength longer than $700\, nm$.
Reason: Here reaction centre is $B-890$.

Which one of the following organisms does not evolve oxygen during photosynthesis?