**Core Concept**
Apoptosis is a complex process of programmed cell death, essential for eliminating damaged or unwanted cells in multicellular organisms. It is regulated by a delicate balance of pro-apoptotic and anti-apoptotic signals, involving various molecular pathways and cellular mechanisms.

**Why the Correct Answer is Right**
Bcl-2 family proteins, particularly the anti-apoptotic members, play a crucial role in inhibiting apoptosis. Bcl-2 (B-cell lymphoma 2) is a key protein that binds to and inhibits the activity of pro-apoptotic Bcl-2 family members, such as Bax and Bak. This interaction prevents the mitochondrial outer membrane permeabilization (MOMP) and subsequent activation of caspases, which are essential for executing cell death. By inhibiting apoptosis, Bcl-2 and other anti-apoptotic proteins help maintain cellular homeostasis and prevent excessive cell death.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not provided, so we'll skip it.
* **Option B:** While some protein kinases, such as PI3K/AKT, can inhibit apoptosis by phosphorylating and activating anti-apoptotic proteins, they are not the primary inhibitors of apoptosis.
* **Option C:** This option is not a known inhibitor of apoptosis.

**Clinical Pearl / High-Yield Fact**
Bcl-2 overexpression is associated with various cancers, including follicular lymphoma, where it contributes to tumor cell survival and resistance to chemotherapy.

**Correct Answer:** C. Bcl-2