Mathematics · 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 elephants are fishes. No fish is a tiger. Some deer are elephants. Conclusions: I. Some fishes are deer. II. No elephant is a deer. III. Some tigers are fishes.