**Core Concept**
Epstein-Barr virus (EBV) is a member of the herpesvirus family that causes infectious mononucleosis, also known as "mono" or the "kissing disease." EBV infection can lead to various complications, including organ dysfunction and increased risk of certain cancers.

**Why the Correct Answer is Right**
The most common cause of death associated with EBV infection is **splenic rupture**. This occurs when the spleen, which is responsible for filtering the blood and storing red blood cells, becomes enlarged and weakened due to the viral infection. The spleen is a highly vascularized organ, and when it ruptures, it can lead to severe bleeding and shock. The mechanism behind splenic rupture in EBV infection involves the activation of EBV-specific lymphocytes, which can cause inflammation and damage to the spleen.

**Why Each Wrong Option is Incorrect**
**Option A:** While EBV-related lymphoma is a significant complication, it is not the most common cause of death in EBV infection.
**Option B:** Encephalitis is a rare but serious complication of EBV infection, and while it can be fatal, it is not the most common cause of death.
**Option C:** Hemolytic anemia is a common symptom of EBV infection, but it is not typically life-threatening.

**Clinical Pearl / High-Yield Fact**
To remember the most common cause of death in EBV infection, recall the phrase **"Spleen rupture is the killer"**. This mnemonic highlights the importance of splenic rupture as a life-threatening complication of EBV infection.

**Correct Answer: C. Splenic rupture.**