Select the wrong statement.

Explanation

The wrong statement is: "Mosaic disease in tobacco and AIDS in human beings are caused by viruses."Explanation of each statement:1. "The term 'contagium vivum fluidum' was coined by M. W. Beijerinck." - This statement is correct. Martinus Beijerinck, a Dutch microbiologist, coined the term "contagium vivum fluidum" to describe infectious agents that are smaller than bacteria, which we now know as viruses.2. "Mosaic disease in tobacco and AIDS in human beings are caused by viruses." - This statement is incorrect. Mosaic disease in tobacco is indeed caused by a virus, but AIDS (Acquired Immunodeficiency Syndrome) is caused by HIV (Human Immunodeficiency Virus), not a virus in general. It's a more specific virus that leads to AIDS.3. "The viroids were discovered by D.J. Ivanowsky." - This statement is incorrect. The discovery of viroids is credited to the American pathologist Theodor O. Diener, not D.J. Ivanowsky. Viroids are small, infectious RNA molecules that are distinct from viruses.4. "W.M. Stanley showed that viruses could be crystallized." - This statement is correct. Wendell Meredith Stanley, an American biochemist, successfully crystallized the tobacco mosaic virus in 1935. His work provided important evidence that viruses are distinct entities that can be purified and studied like other biological molecules.