**Core Concept**
The biopsy findings described are indicative of apoptosis, a form of programmed cell death characterized by cell shrinkage, nuclear fragmentation, and the presence of apoptotic bodies containing both cytoplasm and nuclear fragments.

**Why the Correct Answer is Right**
The presence of fragmented, hyperchromatic nuclei and small discrete blebs containing cytoplasm and nuclear fragments is a classic histopathological hallmark of apoptosis. This process is mediated by a family of cysteine proteases known as caspases, which are activated in response to various cellular stress signals. In the context of graft-versus-host disease, apoptosis of epithelial cells in the gastrointestinal tract can occur due to the immune response of the transplanted cells against the host tissues.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the biopsy findings do not suggest necrosis, which is characterized by cell swelling, loss of membrane integrity, and karyolysis.
* **Option B:** This option is incorrect because the biopsy findings do not suggest inflammation, which would be characterized by the presence of inflammatory cells, such as lymphocytes and neutrophils.

**Clinical Pearl / High-Yield Fact**
The presence of apoptotic bodies in a gastric biopsy can be a useful diagnostic clue for graft-versus-host disease following bone marrow transplantation. This condition is a serious complication of the transplant procedure and requires prompt recognition and treatment.

**Correct Answer:** C. Apoptosis.