- A Mollusca
- B Annelida
- C Arthropoda
- D Chordata
Correct answer: C. Arthropoda
Explanation: Arthropoda is the largest phylum, comprising more than two-thirds of all named animal species, including insects, crustaceans, and arachnids.
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.