Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.

Statements:
All hexagons are pentagons.
All pentagons are octagons.
All octagons are decagons.

Conclusions:
I. All decagons are hexagons.
II. All hexagons are octagons.

Only conclusion II follows