Which was the first stable product in the light-dependent reaction of $C_4$ plants?

Kranz anatomy is found in ............

$C_4$ plants are more photosynthetically efficient than $C_3$ plants because:

In Hatch and Slack pathway,

Study the pathway given below. In which of the following options are the correct words for all the three blanks $A$,$B$,and $C$ indicated?

In sugarcane plants,$^{14}CO_2$ is fixed into malic acid. Which enzyme is responsible for the fixation of $CO_2$ in this process?