How many classes come under the super class Pisces?

Correct option is B

Correct Answer: (b) 7
Explanation:
→ Traditionally, the superclass Pisces is divided into seven classes based on anatomical and evolutionary characteristics.
→ These include Agnatha, Placodermi, Chondrichthyes, Osteichthyes subdivisions, etc.
→ Represents the broad diversity of fishes in the evolutionary tree.
Information Booster:
→ Pisces includes jawless, cartilaginous, and bony fishes.
→ Classification differs slightly among systems but 7 is the widely accepted classical number.
→ Forms the largest group of vertebrates.
Additional Information (Other Options):
(a), (c), (d) — Other numbers do not match classical classification.