Answer: Amphibia.
- A Reptilia
- B Amphibia
- C Pisces
- D Mammalia
Correct answer: B. Amphibia
Explanation: Frogs (Rana) and toads (Bufo) belong to class Amphibia, which can live in both freshwater and on land.
Moving across the animal phyla, body organisation becomes progressively more complex: from no symmetry and cellular organisation (Porifera) through radial/diploblastic (Cnidaria), bilateral/acoelomate (Platyhelminthes), pseudocoelomate (Nematoda), to a true coelom with full organ systems (Annelida and beyond).
Concept context
Phylum-level classification of the animal kingdom from Porifera to Chordata, based on body symmetry, coelom, and segmentation. One of the most example-heavy chapters for NEET.