**Question:** Most common indication of liver transplant in children is

A. Hepatitis B
B. Hepatitis C
C. Alagille syndrome
D. Wilson's disease

**Core Concept:** The liver transplant is a surgical procedure to replace a diseased or failing liver with a healthy liver from a donor. In children, the most common indications for liver transplant are conditions affecting the liver's functionality or structure.

**Why the Correct Answer is Right:** The correct answer is **C. Alagille syndrome**. Alagille syndrome is a rare genetic disorder that primarily affects the liver, heart, and skeleton. It is characterized by cholestasis, posterior embryotoxon, specific facies, and bifid spine. In Alagille syndrome, the liver is damaged, leading to liver failure and the need for a liver transplant.

**Why Each Wrong Option is Incorrect:**

A. **Hepatitis B and Hepatitis C (A and B)** are viral infections that primarily affect the liver. While liver transplants are necessary in some cases of severe hepatitis, they are not the most common indication in children.

B. **Wilson's disease** is a genetic disorder characterized by copper accumulation in the liver, brain, and other organs. While liver transplants may be considered in severe cases, it is not the most common indication in children.

**Clinical Pearl:** The choice of a transplant candidate depends on several factors, including disease severity, patient age, and the availability of a suitable donor. In children, Alagille syndrome is a common indication due to its significant impact on liver function and overall health.

**Correct Answer:** C. Alagille syndrome

**Explanation:** In children, the most common indication for a liver transplant is Alagille syndrome, a rare genetic disorder resulting in liver dysfunction and failure. Other options (A, B, and D) are also liver-related conditions, but they are less common indications for liver transplantation in children compared to Alagille syndrome.