Statements: No fish is a bird. All birds are animals. Conclusions: I. No fish is an animal. II. Some animals are not fish. III. Some animals are birds
Correct answer: A. II and III
- A. II and III
- B. Only III
- C. Only II
- D. None
Explanation
The correct answer is Option A: II and III. Based on the statements, 'No fish is a bird' and 'All birds are animals,' we can deduce the following: Conclusion I: 'No fish is an animal' is incorrect because the statement does not provide information about the relationship between fish and all animals. Conclusion II: 'Some animals are not fish' is correct because all birds are animals, and no bird is a fish, indicating there are animals (birds) that are not fish. Conclusion III: 'Some animals are birds' is correct because all birds, being a subset of animals, means some animals are indeed birds. Thus, both Conclusions II and III follow logically, making Option A the correct choice.
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About Logical Deductions
Logical deductions require conclusions to be drawn from stated facts, conditions and relationships without adding outside information. The work includes handling all, some and none statements, necessary and sufficient conditions, ordering restrictions, true or false conclusions, and the difference between what must be true and what could be true.
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