In the following question, names of animals are given. Three of them are large wild cats, while one is a large bird that cannot fly. Select the animal which is different from the other three (odd one out).

Introduction / Context:
This is a simple general knowledge and classification question about animals. The examiner gives you a list of animal names and asks you to identify which one does not belong to the same broad group as the others. Such questions test your basic awareness of animal types and their main characteristics, which is often covered in school level biology and GK sections of competitive exams.

Given Data / Assumptions:
- The options are Tiger, Ostrich, Lion, Cheetah, and Leopard.
- Tiger, Lion, Cheetah, and Leopard are all big cats and carnivorous mammals belonging to the family Felidae.
- Ostrich is a large bird that cannot fly and belongs to a completely different class of animals (Aves).
- Exactly one animal is not a big cat, and that animal is the odd one out.

Concept / Approach:
The easiest way to approach this question is to classify each animal by broad type: mammal versus bird and then further by family. The big cats share many common features such as sharp claws, strong jaws, and a carnivorous diet. Ostrich, on the other hand, is a flightless bird with feathers and a very different body structure. The animal that does not fit the big cat group will be the one that you must select as different.

Step-by-Step Solution:
Step 1: Tiger is a large carnivorous mammal and a classic example of a big cat.Step 2: Lion is also a big cat, known for living in prides and having a mane in the case of male lions.Step 3: Cheetah is another big cat, famous for its extraordinary running speed and spotted coat.Step 4: Leopard is again a big cat, known for its rosette patterned spots and climbing ability.Step 5: Ostrich, however, is a very large bird that cannot fly. It has feathers, lays eggs, and belongs to a different biological class.Step 6: Thus, Ostrich is the only non feline animal among the options and is the odd one out.

Verification / Alternative check:
You can verify your reasoning by thinking about their habitats, feeding behaviour, and physical structure. Tiger, Lion, Cheetah, and Leopard are predators with similar body shapes and hunting habits. Ostrich, on the other hand, has a long neck, long legs, and uses speed for running rather than for hunting like a cat. It feeds mainly on plants and small creatures and has completely different anatomy, which confirms that it belongs to a different group.

Why Other Options Are Wrong:
Tiger, Lion, Cheetah, and Leopard all belong to the big cat family and are classified as large carnivorous mammals. They share many common traits and are often studied together in zoology and GK. Because they form a natural group, none of them can be considered the odd one out when compared with a bird like Ostrich.

Common Pitfalls:
Sometimes candidates focus on secondary details such as speed or habitat and may temporarily be confused between Cheetah and the others. However, for odd one out questions at this level, examiners typically use broad and clear categories like birds versus mammals or domestic versus wild. When you focus on fundamental classifications, the correct answer becomes obvious and quick to identify.

Final Answer:
Ostrich