Microorganisms or microbes are found in

Who first realized the use of yeast in fermentation?

Who was the first discoverer of an antibiotic?

$A$ large number of organic compounds can be decomposed by

Identify the correct statements from the following:
$(A)$ Microbes have been used for centuries.
$(B)$ Not all microbes are pathogenic.
$(C)$ There are various methods to culture microbes in a nutrient medium.
$(D)$ Fungi,Cycas,viruses,and bacteria are examples of microbes.

Who discovered the process of fermentation?