## Core Concept
The question tests knowledge of cell types and their expression of Human Leukocyte Antigens (HLA), which are crucial for the immune system's recognition of self versus non-self. HLA molecules are part of the major histocompatibility complex (MHC) and play a vital role in the immune response.

## Why the Correct Answer is Right
The correct answer, **D. Red Blood Cells**, is right because mature red blood cells lack a nucleus and most organelles, including the machinery necessary for expressing HLA molecules on their surface. This characteristic is significant for transfusion medicine, as it reduces the immunogenicity of red blood cells.

## Why Each Wrong Option is Incorrect
- **Option A:** Platelets express some HLA class I molecules, although at lower levels than nucleated cells. Their expression of HLA is relevant in transfusion medicine.
- **Option B:** Neutrophils, being nucleated cells, express HLA class I molecules. This expression is crucial for their interaction with the immune system.
- **Option C:** Lymphocytes, including both B cells and T cells, express HLA molecules. In fact, their expression of HLA is critical for their function in the immune response.

## Clinical Pearl / High-Yield Fact
A key point to remember is that while mature red blood cells lack HLA expression, they can still cause immune reactions if not matched properly due to the presence of other antigens like ABO and Rh. This is why blood typing is crucial before transfusions.

## Correct Answer: D. Red Blood Cells