The correct option is A Blood cappillaries of villi
Small intestine are the principal organ for absorption of nutrients. The digestion is completed here and the final products of digestion such as glucose, fructose, fatty acids, glycerol and amino acids are absorbed through the mucosa into the blood stream and lymph. Absorption is the process by which the end products of digestion pass through the intestinal mucosa (blood capillaries of villi) into the blood or lymph. It is carried out by passive, active or facilitated transport mechanisms.