This question is testing the concept of If P, then Q.
If P, then Q also means ~Q --> ~P.
Now, let's discuss the question.
If Literary Classic , then reveal human condition. --(1)
If Unworthy of serious study, then not reveal human condition. --(2)
Let's open the second statement using If P, then Q rule. I mean lets make it ~Q --> ~P
=> reveal human condition --> Worthy of serious study. -- (3)
Let's combine statement (1) and (3) now.
Literary Classic --> reveal human condition --> Worthy of serious study.
This is what option B is doing, hence the correct answer.
(A) Any book worthy of serious study is a literary classic.
--> It is reverse statement. We know that If P, then Q doesn't mean if Q, then P. Hence, incorrect.(B) A book is a literary classic only if it is worthy of serious study.(C) There are no literary classics worthy of serious study.
--> Come on. This is obviously out. This is against to what has been given.(D) Some books worthy of serious study do not reveal anything significant about the human condition.
--> Same as A. If ~Q, then P. (E) Some books that reveal something significant about the human condition are not literary classics.
--> Again, same as A. If Q, then P.