Concept:Blood transports many materials around the body, but not urine.
Explanation:I. Hormones are carried by the blood from endocrine glands to target organs.
II. Urine is produced by the kidneys and removed from the body, not carried by the blood as urine.
III. Oxygen is carried by the blood, mainly bound to haemoglobin in red blood cells.
IV. Carbon dioxide is carried in the blood from body tissues to the lungs for removal.
Thus, the substances are I, III and IV only.
Answer:D. I, III and IV only