**Core Concept**
Kings criteria are a scoring system used to predict the outcome of biliary obstruction in patients with primary sclerosing cholangitis (PSC). This system takes into account various clinical and laboratory parameters to determine the likelihood of developing cholangiocarcinoma, a type of cancer that occurs in the bile ducts.

**Why the Correct Answer is Right**
The Kings criteria were developed to identify patients with PSC who are at high risk of developing cholangiocarcinoma. The criteria include parameters such as age, jaundice, dilated bile ducts, and the presence of dominant strictures. The scoring system is based on the idea that patients with a higher score are more likely to develop cholangiocarcinoma. The criteria have been widely used in clinical practice to guide the management of patients with PSC and to identify those who require more frequent surveillance.

**Why Each Wrong Option is Incorrect**
**Option A:** The Asberg criteria are used to diagnose autoimmune hepatitis, not to predict the outcome of biliary obstruction in PSC.
**Option B:** The Child-Pugh score is used to assess the severity of liver disease in patients with cirrhosis, not specifically to predict the outcome of biliary obstruction in PSC.
**Option C:** The MELD score is used to prioritize patients for liver transplantation, not to predict the outcome of biliary obstruction in PSC.

**Clinical Pearl / High-Yield Fact**
The Kings criteria are an important tool in the management of PSC, and patients with a high score require close surveillance and monitoring for the development of cholangiocarcinoma. Regular imaging studies and endoscopic retrograde cholangiopancreatography (ERCP) may be necessary to detect early signs of cancer.

**Correct Answer: C. Primary sclerosing cholangitis (PSC).**