## Core Concept
The question tests knowledge of the major histocompatibility complex (MHC) in humans, specifically the discovery of Human Leukocyte Antigen (HLA) genes. The MHC is a set of genes crucial for the immune system, and HLA genes are part of this complex, playing a significant role in the body's immune response.

## Why the Correct Answer is Right
Hugh McDevitt discovered the HLA genes, which are part of the human major histocompatibility complex (MHC). His work linked specific HLA types to susceptibility to autoimmune diseases, notably type 1 diabetes. McDevitt's research was pivotal in understanding the genetic basis of immune responses and disease susceptibility.

## Why Each Wrong Option is Incorrect
* **Option A:** Not provided due to lack of specific names in the query.
* **Option B:** Not provided due to lack of specific names in the query.
* **Option D:** Not provided due to lack of specific names in the query.

## Clinical Pearl / High-Yield Fact
A key point to remember is that the discovery of HLA genes has significantly advanced our understanding of transplant immunology and disease association. For instance, HLA typing is critical in organ transplantation to minimize rejection.

## Correct Answer Line
**Correct Answer: C. Hugh McDevitt**