You have to take the given statements to be true even if they seem to be at variance with commonly known facts and then decide which of the given conclusions logically follow(s) from the given statements
Statements: All keys are locks
No lock is a door
All doors are windows
Conclusions: I. No key is a door
Some windows are locks
1) if only conclusions I follows
2) if only conclusions II follows
3) if either I or II follows
4) if neither I nor II follows
5) if both I and II follow

Explanation

1, if only conclusion I follows