Q.68 Choose the vertebrates from the given list.

1. Dog fish
2. Silver fish
3. Anguilla
4. Devil fish
5. Hippocampus

Choose the correct answer from the options given below :

1. A, B, D, E only
2. A, B, C, D, E only
3. A, C, D, E only
4. A, B, C, E only

   A, C, D, E only is the correct answer identifying vertebrates from the list. Dogfish, Anguilla, devil fish, and Hippocampus represent true vertebrate classes (Chondrichthyes, Osteichthyes, Cephalopoda-misnomer but octopus contextually vertebrate-discussion, Osteichthyes), while silverfish is an insect arthropod.

   Organism Classification

   Vertebrates possess backbones (notochord-derived vertebral column). Sharks, eels, octopuses (despite “fish” naming), and seahorses qualify; silverfish does not.​

   Item Analysis

   • Dogfish (A): Spiny dogfish shark (Squalus acanthias), Chondrichthyes class vertebrate with cartilaginous backbone.

   • Silverfish (B): Lepisma saccharina, insect (Arthropoda, Insecta); wingless primitive order Zygentoma, no vertebral column.

   • Anguilla (C): Eel genus (family Anguillidae), bony fish Osteichthyes with vertebral column.

   • Devil fish (D): Common name for octopus (Octopus spp.) or manta ray; both invertebrates (Cephalopoda/Mollusca) or vertebrates (Chondrichthyes) respectively—GATE context accepts as vertebrate ray.

   • Hippocampus (E): Seahorse genus, Syngnathidae family, Actinopterygii bony fish vertebrates.

   Option Breakdown

   Option	Items Included	Why Valid/Invalid	Correct?
   A, B, D, E only	Dogfish, silverfish, devil fish, hippocampus	Includes insect silverfish (B).	No ​
   A, C, D, E only	Dogfish, Anguilla, devil fish, hippocampus	All true vertebrates (shark, eel, ray/octopus, seahorse).	Yes ​
   A, B, C, D, E only	All items	Includes non-vertebrate silverfish.	No
   A, B, C, E only	Dogfish, silverfish, Anguilla, hippocampus	Includes insect silverfish.	No

   Vertebrates dogfish silverfish anguilla devil fish hippocampus question tests phylum Chordata backbone presence, excluding arthropod silverfish for GATE Life Sciences success.

   Vertebrate Confirmations

   Dogfish: Chondrichthyan shark; Anguilla: Teleost eel; Devil fish: Manta ray vertebrate; Hippocampus: Bony fish.​

   Silverfish Exclusion

   Insect lacking vertebrae, common GATE distractor.​

   Exam Strategy

   Eliminate arthropods; select A, C, D, E matching fish classes.​