GS PrelimsScience and TechnologyGeneral Science2003

Octopus is

an arthropod

an echinoderm

a hemichordate

a mollusc

Correct Answer: Option D

Explanation

1. The question asks for the biological classification of an Octopus. 2. Octopus belongs to the class Cephalopoda. 3. Cephalopoda is a class within the phylum Mollusca. 4. Therefore, an Octopus is a mollusc. 5. Option (A) arthropod: Incorrect (includes insects, spiders, crustaceans). 6. Option (B) echinoderm: Incorrect (includes starfish, sea urchins). 7. Option (C) hemichordate: Incorrect (includes acorn worms). 8. Option (D) mollusc: Correct. 9. The correct answer is (D).

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