## Core Concept
The question tests knowledge of vaccine development history, specifically focusing on Louis Pasteur's contributions. Louis Pasteur was a pioneer in vaccination and germ theory. His work led to the development of vaccines for several major diseases.

## Why the Correct Answer is Right
Louis Pasteur developed the **Rabies vaccine**, which is one of his most notable contributions to medicine. The rabies vaccine was developed using a weakened form of the rabies virus. Pasteur's method involved growing the virus in rabbits and then inactivating it, which led to the creation of the first successful vaccine against rabies. This achievement marked a significant milestone in the history of medicine and public health.

## Why Each Wrong Option is Incorrect
* **Option A:** While vaccines for various diseases have been developed over the years, there is no record of Pasteur developing a vaccine for this option (not specified).
* **Option B:** Similarly, without the specific disease mentioned, it's hard to directly refute, but Pasteur's major contributions were for rabies, anthrax, and chicken cholera.
* **Option D:** This option is also unspecified but given Pasteur's known works, we can confirm rabies as his major vaccine development.

## Clinical Pearl / High-Yield Fact
A key point to remember is that Louis Pasteur's development of the **Rabies vaccine** not only saved countless lives but also established vaccination as a critical method of disease prevention. His work laid the foundation for modern vaccinology.

## Correct Answer: C. Rabies.