The correct option is B Graminaceae (Poaceae)
Cereals and millets belongs to Graminaceae (Poaceae) family. Poaceae have hollow stems called as culms plugged at intervals by nodes. Grass leaves are nearly always alternate and distichous and have parallel veins. Each leaf is differentiated into a lower sheath hugging the stem and a blade with entire margins. The leaf blades of many grasses are hardened with silica phytoliths, which discourage grazing animals.
Thus, the correct answer is option B.