Direction: Three statements are given followed by four conclusions. (I), (II), (III) and (IV). You have to consider the statements to be true even if they seem to be at variance from commonly known facts. You are to decide which of the given conclusions, if any, follow from the given statements. Indicate your answer.
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Statements:
(a) All dogs are rats.
(b) All rats are crows.
(c) All crows are parrots.
Conclusions:
(I) All dogs are parrots.
(II) Some parrots are dogs.
(III) Some crows are dogs.
(IV) All rats are dogs.
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- Only (I) and (II) follow
- Only (I), (II) and (III) follow
- Either (II) or (IV) follow
- Either (I) or (II) or (III) follow
Correct Option: B
All the three Premises are Universal Affirmative (A-type).
All dogs are rats. ↔ All rats are crows.
A + A ⇒ A-type of Conclusion “All dogs are crows.”
Conclusion III is converse of it.
All rats are crows. ↔ All crows are parrots.
A + A ⇒ A-type of Conclusion “All rats are parrots.”
All dogs are crows. ↔ All crows are parrots.
A + A ⇒ A-type of Conclusion “All dogs are parrots.”
This is Conclusion I.
Conclusion II is converse of it.
