Blood passing through the hepatic portal vein is rich in glucose and amino acids but not fatty acids. Which one of the following statements justifies this?

Bile activates lipases and so digestion of fats occurs only after they reach liver.

Fatty acids and glycerol, being insoluble in water, cannot be absorbed into the blood.

Digestion of fats begins in the small intestine and is completed in the large intestine.

Fats must be emulsified before they are digested.