You have take the two given statements to be true even if they seem to be at variance with commonly known facts. Read the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts
1) If Only conclusion I follows
2)if only conclusion II follows
3) if either I or II follows
4)if neither I nor II follows
5)if both I and II follows
Statements: All gliders are parachutes
No parachute is an airplane
All airplanes are helicopters
Conclusions: I. No helicopters is a glider
All parachutes being helicopters is a possibility

Explanation

2,if only conclusion II follows