(i) Euphorbia will be able to survive under such conditions.
(ii) Maize is more efficient in terms of photosynthetic activity.
(iii) The maize is a C4 -plants having Kranz anatomy type of leaf anatomy. The bundle sheath
cells are characterised by having a large number of chloroplasts, thick walls impervious to gaseous exchange and no intercellular spaces. While, Euphorbia, which undergoes CAM (Crassulacean Acid Metabolism) both pathways occur in mesophyll cells only they do not have Kranz anatomy. And also their stomata remain closed during the day.