Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements. Statements: Some dolls are rockets. Some rockets are engines. All engines are solids. Conclusions: I. No doll is solid. II. No solid is an engine. III. Some dolls are solid. IV. No engine is a rocket. Correct Answer Either conclusion I or III follows. The least possible Venn diagram for the given statements is as shown below : Additional Information A set of two conclusions is said to be a Complementary Pair and thus form a case of either or when they follow the following conditions- i) Both the objects must be the same in both conclusions. ii) Both the conclusions must be False individually. Some of the cases of complementary pairs are- Some + No & All + Some Not Important Points Some + Some not is never a complimentary pair.