$CAM$ helps the plants in

In $CAM$ cycle,during the formation of malic acid,stomata remain:

Members of the family $Crassulaceae$ perform:

In $C_4$ plants,sugar is produced in

Scotoactive stomata are a characteristic of which plants?

Given below are two statements:
Statement $I$: The primary $CO_{2}$ acceptor in $C_{4}$ plants is phosphoenolpyruvate $(PEP)$ and is found in the mesophyll cells.
Statement $II$: Mesophyll cells of $C_{4}$ plants lack $RuBisCo$ enzyme.
In the light of the above statements,choose the correct answer from the options given below: