General Intelligence · Syllogism

Three statements are given, followed by four conclusions numbered I, II, III and IV. 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: Some cars are bikes. All bikes are trucks. Some trucks are buses. Conclusions: I. Some trucks are cars. II. All buses are cars. III. Some cars are buses. IV. All bikes are buses.