The correct option is A Poaceae
The Poaceae (also called as Gramineae or true grasses) are a large and nearly ubiquitous family of monocotyledonous flowering plants. Poaceae have hollow stems called as culms plugged at intervals by solid leaf-bearing 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 fruit of Poaceae is a caryopsis, in which the seed coat is fused to the fruit wall.
Therefore, the correct answer is option A.