General Intelligence · Syllogism

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 watches are cameras. No camera is a pen. Some watches are balls. Conclusions: I. Some balls are cameras. II. No ball is a pen. III. No pen is a watch.