Who described the taxonomy of plant rust?

Answer: Option B

J. C. Arthur described the taxonomy of plant rust.
J. C. Arthur, an American botanist discovered basic facts about the parasitic fungi known as rusts.
Rust affects many economically important plant species and usually appears as yellow, orange, red, rust, brown, or black powdery pustules on leaves, young shoots, and fruits. Plant growth and productivity are commonly reduced, and some plants wither and die back.
Rusts are a group of fungal diseases affecting the aerial parts of plants. Leaves are affected most commonly, but rust can also be found occasionally on stems and even flowers and fruit.