## Core Concept
The question tests the understanding of various causes of pancreatitis, which is inflammation of the pancreas that can be acute or chronic. The etiologies of pancreatitis are diverse, including gallstones, alcohol consumption, certain drugs, hypertriglyceridemia, hypercalcemia, infections, trauma, and genetic factors.

## Why the Correct Answer is Right
The correct answer involves selecting the option that best encompasses causes of pancreatitis.
- **c) CBD stone** and **d) Alcohol** are well-established causes of pancreatitis. CBD stones can cause pancreatitis by obstructing the pancreatic duct, while alcohol directly damages pancreatic cells and leads to inflammation.
- **b) ↑ed PTH (Hyperparathyroidism)** can cause hypercalcemia, which is another known cause of pancreatitis.
- **a) Ascending cholangitis** is an infection of the biliary tree and is not a direct cause of pancreatitis, though biliary obstruction (like from a stone) can cause it.
- **e) Starvation** or more accurately, malnutrition, is not a direct cause but can be associated with increased risk in certain contexts.

## Why Each Wrong Option is Incorrect
- **Option A:** This option likely does not include alcohol and possibly other correct causes listed.
- **Option B:** Without specifics, if it misses key causes like alcohol or CBD stone, it's incorrect.
- **Option D:** If this option does not include critical causes such as CBD stone, alcohol, or hypercalcemia (↑ed PTH), it would be incorrect.

## Clinical Pearl / High-Yield Fact
A key point to remember is the "4Fs" associated with an increased risk of gallstones and consequently pancreatitis: **Fat**, **Female**, **Fertile**, and **Forty**. However, for pancreatitis causes, remembering **GET SMASHED** can be helpful: **G**allstones, **E**thyl alcohol (alcohol), **T**rauma, **S**teroids, **M**alignancy, **A**scidiase (or hypertriglyceridemia), **S**urgical, **H**ypercalcemia, **E**RCP (endoscopic retrograde cholangiopancreatography), **D**rugs.

## Correct Answer: C.