All Mammals are Viviparous

Mammals are a class of warm-blooded vertebrates that belong to the phylum Chordata. They are characterized by having hair or fur, mammary glands that produce milk for their young, and a four-chambered heart. One of the defining characteristics of mammals is that they are viviparous, which means that they give birth to live young that have developed inside the mother's body.

All Cyclostomes do not Possess Jaws and Paired Fins

Cyclostomes are a group of jawless fish that belong to the superclass Agnatha. They are characterized by having a round, circular mouth that is lined with rows of teeth. Unlike other fish, they do not have paired fins and their bodies are covered in a layer of slime.

All Reptiles have a 3-Chambered Heart

Reptiles are a class of cold-blooded vertebrates that belong to the phylum Chordata. They are characterized by having dry, scaly skin, and laying eggs on land. Reptiles have a three-chambered heart, which means that they have two atria and one ventricle. This design allows for some separation of oxygenated and deoxygenated blood, but not as much as the four-chambered heart found in birds and mammals.

All Pisces have Gills Covered by an Operculum

Pisces is a class of aquatic vertebrates that includes all fish species. They are characterized by having gills that are covered by a bony flap called an operculum. This flap helps to protect the delicate gill structures and allows for efficient gas exchange in the water. Fish also have fins that help them to swim and maneuver in their aquatic environment.

all are incorrect except bso the answer is b