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 cranes are bears.

Some tigers are cranes.

All jackals are tigers.

Conclusions:

I. Some bears are tigers.

II. All jackals are bears.

III. Some jackals are bears.