Yes it is true, i actually know from experience.
I think it is B i could be wrong tho
Once absorbed, amino acids travel from the small intestine via the portal vein to the liver.
A tract in the spinal cord would most likely be found in the white matter is the peripheral region that contains sensory and motor neurons. This region surrounds the central canal which is an extension of a ventricle. So the answer to your question is the peripheral region.