**Core Concept**
Gallstones, also known as cholelithiasis, are solid particles that form in the gallbladder due to an imbalance of the bile's chemical composition, leading to the precipitation of cholesterol, bilirubin, or calcium salts. This can result in a range of symptoms from asymptomatic to severe abdominal pain and pancreatitis.

**Why the Correct Answer is Right**
The correct answer will be a statement that accurately reflects the pathophysiology, clinical presentation, or treatment of gallstones. For example, **Option A**: "Gallstones are more common in women" is correct, as hormonal fluctuations during the menstrual cycle, pregnancy, and menopause contribute to the increased risk of developing gallstones in females. This is due to the increased levels of estrogen, which can lead to an increase in cholesterol production in the liver and subsequent precipitation in the gallbladder.

**Why Each Wrong Option is Incorrect**
* **Option B:** "Gallstones are always painful" - This is incorrect, as many individuals with gallstones are asymptomatic and may not experience any symptoms at all. However, when symptoms do occur, they can range from mild to severe and include abdominal pain, nausea, and vomiting.
* **Option C:** "Surgery is the only treatment for gallstones" - This is incorrect, as there are various treatment options available, including watchful waiting, medical dissolution therapy, and minimally invasive procedures like endoscopic retrograde cholangiopancreatography (ERCP).
* **Option D:** "Gallstones are a common cause of pancreatitis" - This is incorrect, as while gallstones can cause pancreatitis, they are not the most common cause. Other causes of pancreatitis include gallstone pancreatitis, biliary pancreatitis, and idiopathic pancreatitis.

**Clinical Pearl / High-Yield Fact**
A key clinical correlation to remember is the association between gallstones and other metabolic disorders, such as obesity, diabetes mellitus, and dyslipidemia. Patients with these conditions are at increased risk of developing gallstones due to the shared underlying pathophysiological mechanisms.

**Correct Answer: D. Gallstones are a common cause of pancreatitis.**