By which process is $CO_2$ not added into the atmosphere?

Statement $P$: During the dark reaction of photosynthesis,ketotriose is synthesized.
Statement $Q$: The sugar present in the structure of $ATP$ is an example of a ketopentose sugar.

Match the following columns:

Column $I$	Column $II$
$i.$ Mitochondrial matrix	$p.$ Photophosphorylation
$ii.$ Chloroplast stroma	$q.$ Oxidative phosphorylation
$iii.$ Cristae	$r.$ Krebs cycle
$iv.$ Granum	$s.$ Dark reaction

Which of the following statements is incorrect regarding photosynthesis?

Which of the following is the first stable product in the $C_3$ and $C_4$ cycle of photosynthesis,respectively?

Assertion: Six molecules of $CO_2$ and twelve molecules of $NADPH + H^+$ and $18\, ATP$ are used to form one hexose molecule.
Reason: Light reaction results in the formation of $ATP$ and $NADPH_2$.