What is the effect of high $CO_{2}$ concentration and higher values of $ATP/ADP$ ratio?

Match List-$I$ with List-$II$:

List-$I$	List-$II$
$a.$ $3$-carbon organic acid	$I.$ Product of light reaction
$b.$ $\text{ATP}$ and $\text{NADPH}$	$II.$ Reactants of dark reaction
$c.$ $\text{CO}_2$	$III.$ First $\text{CO}_2$ fixation product in dark reaction
$d.$ Oxaloacetic acid	$IV.$ First product of $\text{CO}_2$ fixation in the $C_4$ pathway

Choose the correct answer from the options given below:

Under conditions of constant illumination,the compensation period for a whole aquarium would be of infinite length when:

$I.$ In $C_{3}$-plants,the Calvin pathway takes place in mesophyll cells.
$II.$ In $C_{4}$-plants,the Calvin pathway takes place in the mesophyll cells.
Which of the following statements is true?

$CO_2$ is constantly released in respiration,yet its level remains fairly uniform because:

Find the incorrect statement$(s)$ about photosynthesis from the following:
$A$. The water-splitting complex is associated with $PS-I$.
$B$. $C_4$ plants use the $C_3$ pathway of $CO_2$ fixation as the main biosynthetic pathway.
$C$. In $C_4$ plants,photorespiration does not occur.
$D$. $C_3$ plants exhibit 'Kranz' anatomy.
$E$. $ATP$ synthesis in chloroplast occurs through chemiosmosis.