Bunuel wrote:
Almost all of the books published in the past 150 years were printed on acidic paper. Unfortunately, every kind of acidic paper gradually destroys itself due to its very acidity. This process of deterioration can be slowed if the books are stored in a cool, dry environment. Techniques, which are now being developed, to deacidify books will probably be applied only to books with historical significance.
If all of the statements in the passage above are true, which one of the following must also be true?
(A) If a book was published in the past 150 years and is historically insignificant, it will probably deteriorate completely.
(B) Almost all of the books published in the past 150 years will gradually destroy themselves.
(C) Almost all of the books that gradually deteriorate are made of acidic paper.
(D) If a book is of historical significance and was printed before 150 years ago, it will be deacidified.
(E) Books published on acidic paper in 1900 should now all be at about the same state of deterioration.
Lets go Option wise:
(A) If a book was published in the past 150 years and is historically insignificant, it will probably deteriorate completely. Correct -
As the last line states only books with significance will be saved i.e. insignificant books get destroyed
(B) Almost all of the books published in the past 150 years will gradually destroy themselves.
Already stated in paragraph(C) Almost all of the books that gradually deteriorate are made of acidic paper.
Not necessary to be true, non acidic paper will also degrade(D) If a book is of historical significance and was printed before 150 years ago, it will be deacidified.
Already stated in paragraph, also irrelevant(E) Books published on acidic paper in 1900 should now all be at about the same state of deterioration.
Irrelevant
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38% (01:51) correct 
