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 buses are trucks.

All motorbikes are trucks.

All cars are trucks.

Conclusions:

I. Some trucks are motorbikes.

II. Some cars are motorbikes.

III. Some trucks are buses.