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 stems are leaves.
All fruits are leaves.
All leaves are trunks.

Conclusions:
I. All fruits are trunks.
II. All trunks are stems.
III. Some trunks are fruits.