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:
Some vehicles are cars.
All cars are four-wheelers.
Some four-wheelers are trucks.

Conclusions:
I. Some vehicles are trucks.
II. Some four-wheelers are vehicles.
III. Some trucks are cars.