Concept:This is a syllogism problem using the word "only" to mean exclusive relation.
Explanation:Step 1: Interpret "Only books are diary".
This means all diaries are books, and diary can be related only to books.
So diary cannot have any relation (like "some diary are earphones") with any other element.
Thus conclusion I is false.
Step 2: For conclusion II, "Few laptops are books is a possibility".
"Few" means "some".
There is no direct positive or negative link between laptops and books in the statements.
So it is possible that some laptops are books.
Thus conclusion II follows.
Step 3: Only conclusion II is true.
Answer:Option B (Only conclusion II follows) is correct.