Delhi Police Constable 5 Dec 2017 Shift 1 Paper

In 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 given conclusion logically follows the given statements,
Statements:
I. Some pens are round.
II. All round are black.
Conclusions:
I. All black are pens.
II. Some round are black.
III. All round are pens.