Which is known as fish moth?

Answer: Option B

Zygentomata is known as fish moth.
Zygentoma is an order in the class Insecta, and consists of about 550 known species. The Zygentoma include the so-called silverfish or fishmoths, and the firebrats.
The name "Zygentoma" is derived from the Greek (zygon), in context meaning "yoke" or "bridge"; and (entoma), "insects", literally "cut into" because of the segmented anatomy of typical insects.
Silverfish are so-called because of the silvery glitter of the scales covering the bodies of the most conspicuous species. Their movement has been described as "fish-like" as if they were swimming.