## **Core Concept**
The question tests knowledge on the association between infections and splenic rupture. Certain infections can cause splenomegaly and potentially lead to splenic rupture. The spleen is an organ rich in reticuloendothelial cells and is involved in filtering the blood and storing red blood cells.

## **Why the Correct Answer is Right**
The correct answer, **Infectious mononucleosis (caused by Epstein-Barr Virus)**, is associated with splenomegaly and an increased risk of splenic rupture. This condition, also known as "mono" or the "kissing disease," often presents with fever, sore throat, and lymphadenopathy. The spleen enlargement in infectious mononucleosis is due to the proliferation of lymphocytes within the spleen. Although rare, splenic rupture is a recognized and feared complication.

## **Why Each Wrong Option is Incorrect**
- **Option A:** Malaria causes splenomegaly due to the accumulation of parasitized red blood cells and immune cells. While significant, the risk of splenic rupture is less commonly emphasized compared to infectious mononucleosis.
- **Option B:** Tuberculosis can involve the spleen (splenic TB), leading to splenomegaly. However, it is not as commonly associated with splenic rupture as infectious mononucleosis.
- **Option D:** Typhoid fever can cause splenomegaly but is less frequently linked to splenic rupture compared to infectious mononucleosis.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that patients with infectious mononucleosis should avoid contact sports or activities that could lead to abdominal trauma for a period after the onset of illness, typically until the spleen size has normalized. This precaution helps minimize the risk of splenic rupture.

## **Correct Answer:** .