**Core Concept**
Nephrotic syndrome is a clinical condition characterized by severe albuminuria (excretion of >3.5 g of protein in 24 hours), hypoalbuminemia, hyperlipidemia, and edema. The pathophysiology involves damage to the glomerular filtration barrier, leading to the loss of large proteins in the urine.

**Why the Correct Answer is Right**
Fibrinogen is a large, negatively charged protein that is not typically lost in the urine in nephrotic syndrome. This is because the glomerular basement membrane and podocytes are impermeable to fibrinogen due to its size and charge. In contrast, albumin, transferrin, and ceruloplasmin are all smaller proteins that can pass through the damaged glomerular filtration barrier, leading to their decreased levels in the blood. The correct answer is C. Fibrinogen.

**Why Each Wrong Option is Incorrect**
**Option A:** Transferrin is a small protein that is lost in the urine in nephrotic syndrome, leading to decreased levels in the blood.
**Option B:** Ceruloplasmin is a small protein that is also lost in the urine in nephrotic syndrome, resulting in decreased levels in the blood.
**Option D:** Albumin is the most abundant protein in the blood and is severely lost in the urine in nephrotic syndrome, leading to decreased levels in the blood.

**Clinical Pearl / High-Yield Fact**
In nephrotic syndrome, the loss of albumin and other proteins leads to a decrease in oncotic pressure, resulting in edema. Additionally, the loss of albumin-bound hormones and vitamins can lead to deficiencies and electrolyte imbalances.

**✓ Correct Answer: C. Fibrinogen**