SSC GD Constable 18 Feb 2019 Shift 3 Paper

The statement below is followed by three conclusions labelled I, II and III. You have to assume everything in the statement to be true, and then decide which of the three suggested conclusions logically follows for pursuing.
Statements:
1) No school is an institution but they are establishment. 
2) All establishments that are not institutions have buildings.
Conclusions:
I. Schools are not establishments.
II. All schools have buildings.
III. Schools do not have buildings.