SSC CPO 1 July 2017 Shift 2 Paper

In each of the following question below are given some statements followed by some conclusions. Taking the given statements to be true even if they seem to be at variance from commonly known facts, read all the conclusions and then decide which of the given conclusion logically follows the given statements.
Statements:
All pens are cups.
All glasses are cups.
Conclusions:
I. Some pens are glass.
II. Some glasses are cups.
III. Some glasses are pens.