Statements: All students are humans. All humans are animals. Conclusions: I. All students are animals. II. Some animals are humans.
Correct answer: A. Both I and II
- A. Both I and II
- B. Only I
- C. Only II
- D. None
Explanation
The correct answer is Option A: Both I and II. Conclusion I follows logically because if all students are humans and all humans are animals, then by transitive property, all students must also be animals. Conclusion II is true because if all humans are animals, then at least some of the animals are indeed humans. Option B is incorrect because it dismisses the valid conclusion II. Option C is incorrect because it overlooks the straightforward deduction of conclusion I. Option D is incorrect as both conclusions can be logically derived from the given statements.
Last updated
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.
Practise Logical Deductions
200 free Logical Deductions MCQs from Analytical and Logical Reasoning, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Analytical and Logical Reasoning questions like this
Analytical and Logical Reasoning is on 24 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
(1) Mehwish is standing on a chair behind Abdullah (2) Abdullah is standing on the chair behind Bilal (3) Bilal is standing on the chair behind Mehwish. If the first two statements are correct, then the third one is:
A ball is a sphere. All spheres are round. Some round things are mesmerizing. Which of the following conclusions is NECESSARILY TRUE? Conclusions: I. All balls are mesmerizing. II. All round things are spheres. III. Some mesmerizing things are spheres.
A is the father of B. B is the sister of C. C is the daughter of D. Which statement must be true?
All cats are animals. Some animals are dogs. Which of the following is true?
All pens are pencils. All pencils are erasers. Which conclusion follows?