**Core Concept**
The Golgi apparatus is a complex organelle found in eukaryotic cells, responsible for protein modification, sorting, and packaging. It consists of a series of flattened sacs and tubules, known as cisternae, which are stacked on top of each other.

**Why the Correct Answer is Right**
The Golgi apparatus plays a crucial role in post-translational modification of proteins, including glycosylation, phosphorylation, and lipidation. It receives proteins synthesized by the endoplasmic reticulum and modifies them to prepare them for secretion or transport to other parts of the cell. The Golgi apparatus also packages these modified proteins into vesicles for transport to their final destination.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the Golgi apparatus is not involved in the synthesis of proteins. Protein synthesis occurs in the ribosomes, which are attached to the endoplasmic reticulum.

**Option B:** This option is incorrect because the Golgi apparatus is indeed involved in the modification of proteins, including glycosylation, phosphorylation, and lipidation. These modifications are essential for the proper functioning of proteins.

**Option C:** This option is incorrect because the Golgi apparatus is not directly involved in the breakdown of proteins. Protein degradation occurs in the lysosomes, which contain digestive enzymes that break down proteins and other cellular components.

**Clinical Pearl / High-Yield Fact**
The Golgi apparatus is often referred to as the "post office" of the cell because it packages and sorts proteins for transport to other parts of the cell or for secretion.

**Correct Answer:** None of the above