**Core Concept**
The glucose tolerance test (GTT) is a diagnostic tool used to assess the body's ability to regulate blood glucose levels after a glucose load. In a normal individual, glucose is absorbed from the gut, leading to a peak in blood glucose levels, which is then followed by a gradual decrease as insulin-mediated glucose uptake by cells occurs.

**Why the Correct Answer is Right**
The normal glucose tolerance curve is characterized by an initial rapid increase in blood glucose levels, peaking at around 1-2 hours after glucose ingestion (the 'ketoacidotic peak'). This is followed by a gradual decline in blood glucose levels as insulin secretion increases, promoting glucose uptake by cells, and glucagon secretion decreases, reducing glucose release from stored glycogen. The curve typically returns to baseline levels within 2-3 hours.

**Why Each Wrong Option is Incorrect**
**Option A:** This option would represent a diabetic curve, characterized by an exaggerated peak and delayed return to baseline levels.
**Option B:** This option would represent a curve seen in individuals with liver disease, such as cirrhosis, where glucose levels remain elevated due to impaired glucose storage and release.
**Option C:** This option would represent a curve seen in individuals with pancreatic disorders, such as pancreatitis or pancreatic surgery, where insulin secretion is impaired.

**Clinical Pearl / High-Yield Fact**
In clinical practice, the glucose tolerance test is often used to diagnose diabetes mellitus and impaired glucose tolerance, which are risk factors for cardiovascular disease, nephropathy, and other complications.

**Correct Answer: B. Normal Glucose Tolerance Curve**