Correct option is A
· Kranz anatomy is a special leaf anatomy found in C4 plants, including sugarcane (A).
· Maize is also a C4 plant, which means it follows the Hatch-Slack pathway (B).
· C4 photosynthesis was discovered by Hatch and Slack, explaining CO2 fixation in C4 plants (D).
· However, photolysis of water in photosynthesis requires Mn (Manganese) ions, not Mg++, making (C) incorrect.