**Core Concept**
Hemorrhagic pancreatitis is a severe form of acute pancreatitis characterized by **necrosis** and **hemorrhage** in the pancreatic tissue. The underlying principle involves the activation of **digestive enzymes** within the pancreas, leading to autodigestion and inflammation.

**Why the Correct Answer is Right**
The correct answer involves signs that indicate severe pancreatic damage, such as **Grey Turner's sign** (flank bruising) and **Cullen's sign** (periumbilical bruising), which are indicative of retroperitoneal hemorrhage. These signs occur due to the tracking of blood along fascial planes from the pancreas to the skin.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it does not specify signs related to hemorrhagic pancreatitis.
**Option B:** Incorrect as it may relate to other conditions without specifying hemorrhagic pancreatitis signs.
**Option C:** Incorrect because, while it might be related to pancreatitis, it does not directly indicate hemorrhage.
**Option D:** Incorrect as it is not a recognized sign of hemorrhagic pancreatitis.

**Clinical Pearl / High-Yield Fact**
Remembering that **Grey Turner's sign** and **Cullen's sign** are classic but rare indicators of severe pancreatitis can be crucial for diagnosis. These signs are associated with increased mortality and necessitate prompt medical intervention.

**Correct Answer:** D. Grey Turner's sign and Cullen's sign.