Question

Statements :
A. All stairs are lifts.
B. No lift is an escalator.
C. Some escalators are helicopters.
D. Some lifts are planes.
Conclusions :
I. No stairs is an escalator.
II. Some helicopters are not escalators.
III. Some stairs are planes.
IV. Some helicopters are escalators.
This questions a few statements are followed by four conclusions numbered I, II, III and IV. Consider the given statements tobe true even if they seem to be at variance with commonly known facts. Read all the conclusion(s) and then decide which of the given conclusion(s) logically follow(s) from the given statements.

• A. Only I and IV follow
• B. Only I and either II or IV follow
• C. Either II or IV follows
• D. Only I, III or IV follow

Answer 1

The Correct Option is B

The correct option is (B): Only I and either II or IV follow
Reason: Conclusion I ("No stairs is an escalator") follows because all stairs are lifts, and no lift is an escalator. Conclusion II ("Some helicopters are not escalators") is plausible but not definitively supported, while Conclusion IV ("Some helicopters are escalators") contradicts the statements. Therefore, only I and either II or IV can be considered valid.