Question

In each of the questions below are given two statements followed by two conclusions numbered I and II. You have to take the given statements to be true even if they seem to be at variance from commonly known facts and then decide which of the given conclusions logically follows from the statements disregarding commonly known facts.

Statements
All rivers are lakes.
All lakes are oceans.

Conclusions
I. All rivers are oceans.
II. At least some oceans are lakes.

• A. Only conclusion I follows
• B. Only conclusion II follows
• C. Either conclusion I or conclusion II follows
• D. Neither conclusion I nor conclusion II follows
• E. Both conclusions I and II follow

Answer 1

The correct option is E Both conclusions I and II follow

All rivers are lakes.
All lakes are oceans.
$A+A\Rightarrow A$-type of conclusion
All rivers are oceans.
This is conclusion I.
Conclusion II is the converse of the second premise.