The correct answer is option 4, Jonas Salk.

Option 1, Louis Pasteur, is known for his work in microbiology and developing vaccines, but he did not discover the Polio vaccine.

Option 2, Konard Zuse, was a German engineer and computer pioneer, and he has no connection to the discovery of the Polio vaccine.

Option 3, Eli Whitney, was an American inventor known for inventing the cotton gin, and he also has no connection to the Polio vaccine.

Jonas Salk, an American medical researcher, is credited with discovering and developing the Polio vaccine. In the early 1950s, he led a team at the University of Pittsburgh School of Medicine that successfully tested and developed the vaccine. The vaccine, known as the Salk vaccine or inactivated polio vaccine, was made by inactivating the poliovirus and injecting it into individuals to build immunity against the disease. The vaccine was an important breakthrough in the fight against polio, a highly contagious and crippling disease, and played a significant role in the eventual eradication of polio in many parts of the world.