What is the study of true fungi called?

The study of true fungi is referred to as mycology. Mycology encompasses the examination of various aspects of fungi, including their genetics, taxonomy, ecology, and their interactions with other organisms, including humans. Fungi are a distinct kingdom of organisms separate from plants and animals, and mycology is essential for understanding their various roles in ecosystems, their use in medicine and industry, as well as their potential to cause diseases.

The other fields mentioned in the options focus on entirely different areas of study; virology examines viruses, bacteriology focuses on bacteria, and pathology is concerned with diseases in general and the changes they cause in the body. Mycology specifically targets fungi, making it the correct choice for the study of true fungi.