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:
No pen is a pencil.
No eraser is a cup.
All pencils are erasers.
Conclusions:
I. Some pens are not erasers.
II. Some erasers are not pens.
III. No pencil is a cup.
IV. Some erasers are cups.