Question

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

Statements
All glasses are rooms.
Some rooms are planes.
All planes are ducks.
Some ducks are lanterns.

Conclusions
I. Some lanterns are planes.
II. Some ducks are rooms.
III. Some rooms are glasses.
IV. Some ducks are glasses.

• A. Only I and II follow
• B. Only II and III follow
• C. Only I, II and III follow
• D. All I, II, III and IV follow
• E. None of these

Answer 1

The correct option is B Only II and III follow

Some rooms are planes.
All planes are ducks.
$I+A\Rightarrow I$-type of conclusion
Some rooms are ducks.
Conclusion II is the converse of it.
Conclusion III is the converse of the first premise.