**Core Concept**
Fatty acids are an essential source of energy for many cells, particularly in the heart, muscles, and liver. They are derived from triglycerides, which are broken down into glycerol and free fatty acids through lipolysis. The utilization of fatty acids as an energy source involves various cellular mechanisms, including beta-oxidation, which is the process of breaking down fatty acids into acetyl-CoA units that can be fed into the citric acid cycle.

**Why the Correct Answer is Right**
The correct answer is **RBCs (Red Blood Cells)** because they lack the necessary enzymes and organelles to perform beta-oxidation of fatty acids. RBCs are dependent on anaerobic glycolysis for energy production, which is less efficient than fatty acid oxidation. This is because RBCs lack mitochondria, the site of beta-oxidation, and also lack the enzyme carnitine palmitoyltransferase (CPT), which is essential for the transport of long-chain fatty acids into the mitochondria.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not provided.
* **Option B:** This option is not provided.
* **Option C:** This option is not provided.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that RBCs are unique in their energy metabolism, relying on anaerobic glycolysis due to their lack of mitochondria and other necessary enzymes. This is a key adaptation that allows RBCs to function properly in the absence of oxygen.

**Correct Answer:** .