Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.
Statements:
All rats are lions.
Some rats are jackals.
No jackal is mongoose.
Conclusions:
I. Some jackals are lions.
II. Some rats are not mongoose.
III. No mongoose is a lion.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. Both conclusions I and II follow.
The least possible Venn Diagram for the given statements is drawn below:
Conclusions:
I. Some jackals are lions → True (As all rats are lions, and some rats are jackals, so, some jackals are lions is also true.)
II. Some rats are not mongoose → True (As some rats are jackals, and no jackal is a mongoose, so, some rats are not mongoose is also true.)
III. No mongoose is a lion → False (It is possible, but no definite conclusion can be drawn.)
Hence, Both conclusions I and II follow.