Tobacco mosaic virus was discovered by:

Explanation

Option C is correct. Stanley was the first scientist who crystallized tobacco mosaic virus in 1935.TMV is transmitted from infected plant to healthy plant through contact, such as by touching an infected leaf or by using the same tools on both infected and healthy plants. TMV can also be transmitted through the air, but this is less common. Lwanowsky was a Russian scientist who worked on tobacco mosaic virus. He ground diseased leaves of tobacco plants and filtered them using porcelain filter. He put this filtrate on healthy leaves and they got disease. This showed tobacco plants were not infected by bacteria but by viruses. Félix D'Hérelle was a French-Canadian microbiologist who is credited with the discovery of bacteriophages, viruses that infect bacteria. In 1917, he observed that certain bacteria cultures would clear up spontaneously, and he hypothesized that a virus was responsible for the clearing. He named the virus a bacteriophage, from the Greek words for "bacteria" and "eater." Louis Pasteur was a French chemist and microbiologist who is considered the father of microbiology. He made many important discoveries in the field of microbiology, including the germ theory of disease, pasteurization, and vaccines against rabies and anthrax.