Choose the correct answer from the options given below :

• (1) (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
• (2) (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
• (3) (A)-(II), (B)-(III), (C)-(IV), (D)-(I)
• (4) (A)-(III), (B)-(II), (C)-(I), (D)-(IV)

  Porifera features porous bodies for filter feeding, Ctenophora uses comb plates for movement, Platyhelminthes has flattened bodies often with suckers, and Annelida shows ring-like segmentation. The correct option matches each phylum to its defining characteristic.

  Phylum Characteristics

  These invertebrate phyla represent early animal evolution with distinct body plans.​​

  • Porifera (A): Body with pores and canals in walls (II) for water circulation and feeding.​

  • Ctenophora (B): Comb plates (ctenophores) for locomotion via ciliary beating (III).​

  • Platyhelminthes (C): Flat body, often with suckers for attachment (IV).​

  • Annelida (D): Body segmentation like rings (metamerism) (I).​

  Option Analysis

  • Option (1): (A)-(IV), (B)-(III), (C)-(II), (D)-(I) wrong; Porifera not flat/suckers, Platyhelminthes not pores.​

  • Option (2): (A)-(I), (B)-(II), (C)-(III), (D)-(IV) incorrect; Porifera not segmented, Ctenophora not pores.​

  • Option (3): (A)-(II), (B)-(III), (C)-(IV), (D)-(I) correct; precise alignment with salient features.​​

  • Option (4): (A)-(III), (B)-(II), (C)-(I), (D)-(IV) fails; Porifera no comb plates, Annelida not flat.​

  Correct answer: (3).

  Phylum matching questions for Porifera (pores and canals), Ctenophora (comb plates locomotion), Platyhelminthes (flat body suckers), and Annelida (ring segmentation) test invertebrate zoology fundamentals for exams like GATE Life Sciences.​

  Invertebrate Phyla Overview

  These basal metazoans show progression from cellular (Porifera) to tissue-level organization with segmentation.

  Correct Matches Table

  Phylum (List I)	Feature (List II)	Example
  (A) Porifera	(II) Body pores/canals	Sponges ​
  (B) Ctenophora	(III) Comb plates locomotion	Comb jellies ​
  (C) Platyhelminthes	(IV) Flat body, suckers	Flatworms, flukes ​
  (D) Annelida	(I) Ring segmentation	Earthworms ​

  Option Breakdown

  Options 1/4 mismatch pores/flat; 2 confuses segmentation/pipes; 3 matches textbook features exactly. For prep, note Porifera’s choanocytes, Ctenophora’s colloblasts, Platyhelminthes acoelomate nature, Annelida’s setae.​​