The enzyme required for the $CO_2$ fixation in the $C_4$ cycle is

In $C_{4}$-plants,the RuBisCO enzyme is present in:

Stomata of $CAM$ plants:

Which enzyme catalyzes the photosynthetic $C_4$ cycle?

Identify the reaction for which the $C_4$ plants require some extra $ATP$ molecules in comparison to $C_3$ plants.

During the $C_{4}$-cycle,the acids formed are:
$I$. Picric acid
$II$. $OAA$ (Oxaloacetic acid)
$III$. Malic acid
$IV$. Aspartic acid
Select the correct option.