## Core Concept
The question tests knowledge of a pivotal figure in the history of surgery, specifically someone who introduced a significant innovation in surgical practices to prevent infection. The core concept here revolves around the development of antiseptic practices in surgery.

## Why the Correct Answer is Right
Joseph Lister is renowned for his pioneering work in introducing antiseptic practices in surgery. He was inspired by Louis Pasteur's germ theory of disease and sought to apply it to surgical practices. Lister used carbolic acid as an antiseptic to reduce post-operative infections. His work marked a significant turning point in surgical history, drastically reducing mortality rates associated with surgical infections.

## Why Each Wrong Option is Incorrect
- **Option A:** While Ignaz Semmelweis introduced hand hygiene practices to prevent the spread of infections, his work predated Lister's and did not involve the use of carbolic acid in surgery.
- **Option B:** This option is left blank as per the question.
- **Option D:** Robert Koch made significant contributions to bacteriology, identifying the bacteria responsible for tuberculosis and cholera, but he is not credited with introducing antiseptic surgery practices.

## Clinical Pearl / High-Yield Fact
A crucial point to remember is that Joseph Lister's introduction of antiseptic surgery, using carbolic acid, was a landmark moment in reducing surgical site infections and mortality. This innovation transformed surgery from a high-risk procedure to a much safer one.

## Correct Answer Line
**Correct Answer: C. Joseph Lister.**