The correct option is C Angiosperms
The sieve tubes are closely associated with companion cells which provide strength and nourishment for the general metabolic functions. It is present only in angiosperms. A vessel element or vessel member is one of the cell types found in xylem, the water conducting tissue of plants. Vessel elements are typically found in flowering plants (angiosperms) but absent from most gymnosperms such as conifers.