Three statements are given followed by four conclusions numbered 1, 2, 3, and 4. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically does NOT follow(s) from the statements.
Statements:
All plants are vegetables.
Some plants are poisonous
Some vegetables are poisonous
Conclusions:
I. All vegetables are poisonous
II. Some vegetables are plants
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. Only conclusion II follows.
The least possible Venn Diagram for the given statements is drawn below:
Conclusions:
I. All vegetables are poisonous → Does not follow (It is possible but no definite conclusion can be drawn.)
II. Some vegetables are plants → Follow (As all plants are vegetables, so, some vegetables are plants is also true.)
Hence, Only conclusion II follows.