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 bats are birds.
Some rats are bats.
Conclusions:
I. Some rats are birds.
II. Some birds are bats.
III. All rats are bats.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. Only conclusions I and II follow.
The least possible Venn Diagram for the given statements is drawn below:
Conclusions:
I. Some rats are birds → True (As some rats are bats, and all bats are birds, so some rats are birds.)
II. Some birds are bats → True (As all bats are birds, so some birds are bats.)
III. All rats are bats → False (It is possible, but no definite conclusion can be drawn).