Some books are novels. All novels are fiction. Which of the following conclusions necessarily follows?
Correct: B
From 'Some B are N' and 'All N are F', we can conclude 'Some B are F' by the chain rule of syllogistic reasoning. Since some books are novels and all novels are fiction, those same books are also fiction. This is a valid conclusion. 'All fiction is novels' reverses the universal premise and is invalid. 'No book is fiction' contradicts the chain. 'All books are novels' overgeneralizes from a particular premise.