Identify the correct set of statements related to the movement of substances through vascular tissues.
I. Xylem mainly translocates water, minerals salts and also inorganic solutes.
II. Phloem mainly translocates a variety of organic solutes and also inorganic solutes.
III. Xylem transports substances from roots to aerial parts of the plants.
IV. Phloem transports substances bidirectionally.