The correct option is D Xylem parenchyma
Xylem is a complex permanent plant tissue. It is involved in the conduction of minerals and water from roots to other parts of the plant. It consists of vessels, tracheids, xylem fibres and xylem parenchyma. Except for xylem parenchyma, all other components of xylem tissue are dead. Xylem parenchyma contains parenchymatous cells having a fully functional nucleus and are capable of performing various life processes.