Three Statements are given followed by Four conclusions numbered I, II, III and IV.
Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.

Statements:
Some curtains are pillows.
No pillow is a bedsheet.
Some curtains are bedsheets.

Conclusions:
I. No curtain is a bedsheet.
II. No pillow is a curtain.
III. Some bedsheets are curtains.
IV. Some pillows are curtains.