In this question, three statements followed by two conclusions numbered I and II have been given. You have to take the given statements to be true even if they seem to be at variance from the common facts and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.

Statements :  

Some flats are apartments. 
No apartment is a hall. 

Some halls are rooms. 

Conclusions : 

I. At least some rooms are flats. 

II. No apartment is a room.