The correct answer is: Impure blood.
The right portion of the human heart receives impure blood from the body. This blood is low in oxygen and high in carbon dioxide. The right ventricle then pumps this blood to the lungs, where it is oxygenated and the carbon dioxide is removed. The oxygenated blood then returns to the left side of the heart, which pumps it to the body.
Option A, pure blood, is incorrect because the right portion of the heart receives impure blood. Option B, impure blood, is correct because the right portion of the heart receives impure blood. Option C, mixed blood, is incorrect because the right portion of the heart does not receive mixed blood. Option D, none, is incorrect because the right portion of the heart does receive blood.