In each of the questions below am given four statements followed by four conclusions numbered I, II, Ill and IV. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.
Statements
Some cars are buses.
Some buses are trains.
All airplanes are trains.
All trucks are buses.
Conclusions
I. Some airplanes are trucks.
II. Some cars are trains.
III. Some trucks are airplanes.
IV. No truck is a train.