The correct answer is: D. A.V.Leeuwenhoek
A. Robert Koch was a German physician and microbiologist who is considered one of the founders of modern bacteriology. He is best known for his discovery of the bacteria that cause tuberculosis and cholera.
B. Robert Hooke was an English physicist, anatomist, and microscopist who is considered one of the founders of modern microscopy. He is best known for his discovery of cells.
C. Louis Pasteur was a French chemist and microbiologist who is considered one of the founders of modern microbiology. He is best known for his discovery of the process of pasteurization and his work on the germ theory of disease.
A.V.Leeuwenhoek was a Dutch draper and scientist who is considered one of the first microbiologists. He is best known for his discovery of bacteria and protozoa.
In 1673, Leeuwenhoek used a simple microscope he had constructed to observe “animalcules” in a drop of water. He described these creatures in letters to the Royal Society of London, which published his findings. Leeuwenhoek’s discoveries were revolutionary, and he is considered one of the founders of modern microbiology.