Hypodermis is a part of the outer protective layer in the plant. It is placed below the epidermis. The hypodermis is especially well developed in plants of arid regions and in those with shallow root systems. It also deters the entrance of soil microorganisms. Monocot stem's hypodermis is a region that lies immediately below the epidermis. It is represented by a few layers of compactly arranged sclerenchyma cells. Maize is a monocot. Thus, the correct answer is option C.