Answer: Arthropoda, Insecta.
- A Mollusca, Gastropoda
- B Arthropoda, Insecta
- C Annelida, Polychaeta
- D Chordata, Reptilia
Correct answer: B. Arthropoda, Insecta
Explanation: Cockroach belongs to phylum Arthropoda, class Insecta, characterized by jointed appendages and a chitinous exoskeleton.
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.