## Core Concept
The patient's presentation of repeated episodes of hematemesis, moderate splenomegaly, and esophageal varices without liver decompensation or abnormal liver function tests suggests a condition primarily affecting the portal venous system or causing non-cirrhotic portal hypertension.

## Why the Correct Answer is Right
The presence of esophageal varices and splenomegaly in the absence of liver dysfunction or cirrhosis points towards a diagnosis of **non-cirrhotic portal fibrosis** (NCPF) or **portal hypertension** not due to cirrhosis. NCPF is a condition characterized by fibrosis of the portal vein and its branches, leading to portal hypertension. It predominantly affects young adults and presents with complications of portal hypertension, such as variceal bleeding and splenomegaly, without significant liver dysfunction.

## Why Each Wrong Option is Incorrect
- **Option A:** While liver cirrhosis can cause portal hypertension, the normal liver function tests and absence of jaundice or liver decompensation make it less likely.
- **Option B:** This option would typically present with liver dysfunction and signs of cirrhosis, which are not present here.
- **Option C:** This condition usually presents with a different set of symptoms and is not primarily associated with portal hypertension in the absence of liver disease.
- **Option D:** Although not explicitly listed, any option not suggesting non-cirrhotic portal hypertension or a similar condition would be incorrect due to the clinical presentation.

## Clinical Pearl / High-Yield Fact
A key point to remember is that in **non-cirrhotic portal fibrosis**, the liver function tests are typically normal, and the primary issues are related to portal hypertension, such as variceal bleeding and splenomegaly. This condition is an important cause of portal hypertension in the absence of cirrhosis.

## Correct Answer: C. Non-cirrhotic portal fibrosis.