**Core Concept**
Spleen lobulation is a congenital variation of the spleen, resulting from incomplete fusion of the splenic anlagen during embryonic development. It is a common finding in the pediatric population and can sometimes be mistaken for pathology.

**Why the Correct Answer is Right**
During fetal development, the spleen forms from the fusion of multiple splenic anlagen. If these anlagen do not fully fuse, they can result in the formation of distinct lobules or segments within the spleen. This can give the spleen a lobulated or nodular appearance on imaging studies. The correct answer is related to this embryological process.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not directly relate to the embryological development of the spleen. While it may be a relevant concept in other contexts, it is not specifically related to spleen lobulation.
**Option B:** This option is incorrect because it is a characteristic of the liver, not the spleen. The liver is divided into lobules, which are formed by the hepatocytes and other liver cells.
**Option C:** This option is incorrect because it refers to the process of apoptosis, or programmed cell death, which is not directly related to the formation of spleen lobulation.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that spleen lobulation is a normal variant and does not typically require any treatment. However, it can be an important consideration in the interpretation of imaging studies, particularly in pediatric patients.

**Correct Answer: C. Incomplete fusion of splenic anlagen.**