The correct answer is option 1, Robert Koch. Robert Koch is credited with discovering the cholera germs. He was a German physician and microbiologist who made significant contributions to the field of medicine. In 1883, Koch isolated and identified Vibrio cholerae, the bacterium responsible for causing cholera. He conducted extensive research on the disease and published his findings, which helped to establish the link between cholera and contaminated water sources. Koch`s discovery of the cholera germs was a major breakthrough in understanding the causes and transmission of the disease. His work laid the foundation for the development of effective treatment and prevention strategies for cholera.