Three statements are given, followed by three conclusions numbered I, II and III. 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:
All rocks are oceans.
All oceans are balloons.
Some watches are balloons.
Conclusions:
I. Some balloons are rocks.
II. Some watches are oceans.
III. All oceans are rocks.