Final answer:
In nephrotic syndrome, albumin levels in the blood are lower than normal because the damaged glomerulus allows albumin to leak into the urine.
Step-by-step explanation:
In nephrotic syndrome, the glomerulus of the kidney is damaged, which results in a large amount of protein, typically albumin, being lost from the blood into the urine. This loss of albumin from the bloodstream into the urine leads to decreased levels of albumin in the blood (hypoalbuminemia), which is a characteristic feature of nephrotic syndrome. Therefore, the component in lower than normal quantities in the blood due to nephrotic syndrome is A) Albumin.