Consider the following list :

Tortoise, Crocodile, Crow, Duck, Fish

In this list which one of the following is different from the others ?

The correct option is Crow.

Step-by-step Explanation:

Let's analyze the habitat and classification of each animal given in the list:

1. Tortoise: Living partially or primarily on land/water, typically associated with semi-aquatic habitats or land.
2. Crocodile: An aquatic/semi-aquatic reptile living in water and on land.
3. Duck: An aquatic bird that swims in water.
4. Fish: A purely aquatic animal living in water.
5. Crow: A terrestrial bird that flies in the air and lives on land/trees.

Except for the Crow, all the other animals listed (Tortoise, Crocodile, Duck, and Fish) can swim or live in water. A crow is an aerial/terrestrial bird and does not live or swim in water, making it different from the others in the list.