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 plains are mountains.
No sea is a mountain.
Some valleys are seas.
Conclusions:
I. Some valleys are plains.
II. No valley is a mountain.
III. No sea is a plain.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. Only conclusion III follows.
The least possible Venn Diagram for the given statements is drawn below:
Conclusions:
I. Some valleys are plains → False (It is possible but not definite)
II. No valley is a mountain → False (It is possible but no definite conclusion can be drawn.)
III. No sea is a plain → True (As all plains are mountains, and no sea is a mountain, so, no sea is a plain is also true.)