Concept:Syllogism: Use Venn diagram to check if conclusions are definitely true given statements.
Explanation:Statements: No mango is apple. Only grapes are apples (all apples are grapes). Only a few grapes are guava (some grapes are guava, some are not).
From the Venn diagram, mango and apple are separate. Apple is inside grapes, so mango may or may not overlap with grapes outside apple. No definite relation exists between mango and grapes.
Conclusion I: No grapes are mango. This is false because mango could overlap with grapes that are not apple.
Conclusion II: Only a few mango are guava. This means some mango are guava and some are not. But no relation between mango and guava is given. So it is not definitely true.
Hence, neither conclusion follows.
Answer:Option E: Neither I nor II follows.
