The correct option is C Virchow
Pasteur work on fermentation and germ theory of biology. Schleiden and Schwann are the co-founders of cell theory. Robert Brown was a Botanist and he discovered the nucleus. Rudolf Virchow was a German Physician, Biologist, Pathologist as well as a writer. The phrase 'Omnis cellula e cellula' is coined by Virchow which means all cells come from a cell, all cells born from a previous cell. So the answer is 'Virchow'.