**Core Concept**
Antiapoptotic genes play a crucial role in preventing programmed cell death, thereby maintaining tissue homeostasis and preventing various diseases. These genes encode proteins that inhibit the activation of caspases, a family of cysteine proteases responsible for executing cell death.

**Why the Correct Answer is Right**
Bcl-2 (B-cell lymphoma 2) is an antiapoptotic gene that inhibits apoptosis by preventing the release of cytochrome c from the mitochondria and thereby blocking the activation of caspase-9. This protein interacts with pro-apoptotic members of the Bcl-2 family to prevent mitochondrial outer membrane permeabilization (MOMP). *Bcl-2* is often overexpressed in various cancers, contributing to tumor development and progression.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not specify an antiapoptotic gene; rather, it is a general term that could refer to various genes involved in apoptosis.
**Option B:** BAX (Bcl-2-associated X protein) is a pro-apoptotic gene that promotes apoptosis by facilitating MOMP, which is the opposite of the function of Bcl-2.
**Option C:** This option is incorrect as it is not a valid gene name related to apoptosis.
**Option D:** This option is incorrect as it is not a specific gene related to apoptosis; it could refer to various genes involved in different cellular processes.

**Clinical Pearl / High-Yield Fact**
It is essential to remember that dysregulation of apoptosis, particularly overexpression of antiapoptotic genes like Bcl-2, contributes to cancer development and resistance to chemotherapy. Understanding the molecular mechanisms of apoptosis is crucial for developing novel cancer therapies.

**Correct Answer:** B. Bcl-2 (B-cell lymphoma 2)