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 trees are walls.
No wall is a door.
Some doors are rooms.
Conclusions:
I. Some rooms are walls.
II. No trees are doors.
III. All walls are trees.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. Only conclusion II follows.
The least possible Venn Diagram for the given statements is drawn below:
Conclusions:
I. Some rooms are walls → False (It is possible, but no definite conclusion can be drawn.)
II. No trees are doors → True (As all trees are walls, and no wall is a door, so, no trees are doors is also true.)
III. All walls are trees → False (It is possible, but no definite conclusion can be drawn.)
Hence, Only conclusion II follows.