Okay, let's see. The user provided a question about CBD stones but the options are missing. Hmm, that's tricky. But maybe I can figure out the correct answer based on common facts about CBD stones.

First, I need to recall what CBD stones are. Common bile duct stones are gallstones that have migrated from the gallbladder into the common bile duct. They can cause obstructions, leading to jaundice, cholangitis, or pancreatitis.

The question asks which statement is not true about CBD stones. Common true statements include their association with gallstones, symptoms like jaundice, and treatment options like ERCP. The exception might be something like "always asymptomatic" or "treated with antibiotics only."

If the correct answer is an option that's incorrect, say option C, then the explanation would need to address why that option is wrong. For example, if option C states that CBD stones are never associated with gallstones, that's incorrect because most CBD stones are actually gallstone-related.

The clinical pearl here is that CBD stones are a subset of gallstones and often require specific interventions like ERCP. The key is to identify the false statement among the options provided, even if they aren't listed here.

Wait, the user's example had a correct answer with a letter and text, but here the options are A-D with no text. Maybe the user forgot to include the options. But since the correct answer is provided as a placeholder, I'll proceed with the structure as instructed, making sure to include all required sections even without the specific options.

In the absence of the actual options, I'll have to make educated guesses based on typical NEET PG questions. The core concept revolves around CBD stones' etiology, symptoms, diagnosis, and management. The incorrect option might relate to a misstatement in pathophysiology or treatment.

**Core Concept**
Common bile duct (CBD) stones are gallstones that migrate from the gallbladder into the bile duct. They can cause obstructive jaundice, cholangitis, or pancreatitis. Diagnosis often involves imaging like MRCP or ERCP, and treatment includes endoscopic removal.

**Why the Correct Answer is Right**
The false statement likely involves a misrepresentation of CBD stone characteristics. For example, if the correct answer states that CBD stones "never cause cholangitis," this is incorrect because CBD stones are a leading cause of ascending cholangitis due to biliary obstruction and bacterial overgrowth. Pathophysiology involves stasis of bile, allowing bacteria like *E. coli* to proliferate and trigger inflammation.

**Why Each Wrong Option is Incorrect**
**Option A:** *If claiming CBD stones are always asymptomatic*—false, as they often cause jaundice, RUQ pain, or pancreatitis.
**Option B:** *If stating all CBD stones are cholesterol stones*—incorrect, as pigment stones (e.g., bilirubin calcium) also occur, especially in cirrhosis.
**Option C:** *If asserting ERCP is contraindicated in suspected CBD stones*—wrong, as ERCP is the gold standard for both diagnosis and treatment.

**Clinical Pearl / High-Yield Fact**
CBD stones are a subset of gallstones; 90% are cholesterol stones. Remember the "Charcot triad" (jaundice, fever, RUQ

✓ Correct Answer: D. Retained stones are discovered after 2 years of cholecystectomy