**Core Concept**
The patient's presentation is suggestive of obstructive jaundice, characterized by the elevation of alkaline phosphatase levels, jaundice, and pruritis. This condition occurs due to the obstruction of bile flow, leading to the accumulation of conjugated bilirubin in the blood.

**Why the Correct Answer is Right**
The patient's symptoms and lab findings are consistent with a diagnosis of choledocholithiasis, where a gallstone is obstructing the common bile duct. The minimally elevated SGOT/SGPT levels suggest that the liver parenchyma is not significantly affected, but the increased alkaline phosphatase levels indicate a problem with the biliary system. The CT abdomen and ERCP would likely reveal a gallstone causing the obstruction in the common bile duct.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not relate to the patient's presentation of obstructive jaundice. The correct diagnosis is choledocholithiasis, not cholangiocarcinoma.

**Option B:** This option is incorrect as it refers to a condition that affects the intrahepatic bile ducts, whereas the patient's symptoms suggest an obstruction in the common bile duct.

**Option C:** This option is incorrect as it refers to a condition that affects the gallbladder, whereas the patient's symptoms suggest a problem in the common bile duct.

**Option D:** This option is incorrect as it does not relate to the patient's presentation of obstructive jaundice. The correct diagnosis is choledocholithiasis, not ampullary carcinoma.

**Clinical Pearl / High-Yield Fact**
In cases of obstructive jaundice, it is essential to perform imaging studies such as CT abdomen and ERCP to identify the site and cause of the obstruction. This can help guide treatment and improve patient outcomes.

**Correct Answer:** C.