Seven books are placed one above the other in a particualr way. History book is placed exactly ab

A. The Economics book is between English and Science books.

B. There are two books between English and History books.

C. The Geography book is above English book.

D. The Science book is placed at the top.

E. No other information is required.

Answer: E. No other information is required.

Clearly, the sequence of the five books mentioned, from top to bottom is :
---, History, Civics, Geography, English, Economics, ----

Clearly, History, Civics and Geography are three books kept above English.
To find this, no information other than the given ones is required.

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