Three statements are given, followed by three conclusions numbered I, II, and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.
Statements:
All insects are birds.
All reptiles are birds.
No crab is a bird.
Conclusions:
I. No insect is a reptile.
II. Some insects are reptiles.
III. No crab is a reptile.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4, i.e., Only Conclusion III and either I or II follow.
Conclusions:
I. No insect is a reptile → Does not follow (In the statement, there is no direct relation between both so it may be possible, not sure.)
II. Some insects are reptiles → Does not follow (In the statement, there is no direct relation between both, so it may be possible, not sure.)
III. No crab is a reptile → Follows(Reptile is in bird, and all birds are not crab, so definitely no crab is a reptile.)