Concept:Complementary pair in syllogism.Explanation:"Some bottles are pencils" and "Some pencils are glasses" do not establish any definite relation between bottles and glasses.It is possible that some bottles are glasses, or that no bottle is a glass.Thus, neither conclusion I nor conclusion II individually follows.However, conclusions I and II form a complementary (contradictory) pair: one is the negation of the other.In such cases, the correct answer is "either I or II follows."Answer:Either I or II follows.