Concept:The figure is the longitudinal section of a maize grain, a monocot seed with one cotyledon called the scutellum.Explanation:The outermost covering of a maize grain is the pericarp, which remains fused with the seed coat, so label X is the pericarp.The large, starchy storage region that nourishes the embryo is the endosperm, so label Y is the endosperm.The shield-shaped single cotyledon lying beside the embryo and pressed against the endosperm is the scutellum, so label Z is the scutellum.Thus the parts are X - Pericarp, Y - Endosperm, Z - Scutellum.Answer:X - Pericarp, Y - Endosperm, Z - Scutellum. Hence option A is correct.
