Which one of the following is a $C_4$ plant?

$A$ plant in your garden avoids photorespiratory losses,has improved water use efficiency,shows high rates of photosynthesis at high temperatures,and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant?

$C_4$ plants show adaptation to .........

In what kind of plants do you come across 'Kranz' anatomy? To which conditions are those plants better adapted? How are these plants better adapted than the plants,which lack this anatomy?

Stomata of $CAM$ plants:

How many types of photosynthetic cells occur in $C_4$ plants?