Question:

Which is odd?
Tortoise, Crab, Frog, Fish

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When classifying animals in logical reasoning, first look for the most basic survival traits: habitat (land/water/air), diet (herbivore/carnivore), or reproduction (mammal/egg-laying).
Updated On: May 9, 2026
  • Tortoise
  • Crab
  • Frog
  • Fish
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The Correct Option is D

Solution and Explanation




Step 1: Understanding the Question:

This is a classification (odd one out) problem based on the biological characteristics and natural habitats of the given animals.


Step 2: Detailed Explanation:

Let us evaluate the survival environments of each animal:
- Tortoise: A reptile that can live on land. (Its aquatic counterpart is the turtle, but both can breathe air and survive outside water).
- Crab: A crustacean that is amphibious in nature, capable of surviving both in water and on land.
- Frog: An amphibian that lives both in water and on land.
- Fish: A strictly aquatic creature equipped with gills, which can only survive in water and dies when kept on land.
Therefore, Tortoise, Crab, and Frog share a common characteristic: they can all survive on land. The Fish is the only organism that is exclusively aquatic.


Step 3: Final Answer:

Fish is the odd one out.
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