(i) Seven books are placed one above the othe | vedclass

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(NONE) Let the positions be $1$ to $7$ from top to bottom.From $(iii)$,Geography is $4^{th}$ from bottom,so it is at position $7 - 4 + 1 = 4^{th}$ fro

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The Geography book is above English book.

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(NONE) Let the positions be $1$ to $7$ from top to bottom.From $(iii)$,Geography is $4^{th}$ from bottom,so it is at position $7 - 4 + 1 = 4^{th}$ from top.English is $5^{th}$ from top.From $(ii)$,History is immediately above Civics.From $(iv)$,there are two books between Civics and Economics.Arranging these: If History is $1^{st}$ and Civics is $2^{nd}$,then Economics must be $5^{th}$ (since two books are between $2$ and $5$). But English is $5^{th}$.If History is $2^{nd}$ and Civics is $3^{rd}$,then Economics must be $6^{th}$.Thus,the order from top to bottom is: $1$: Science,$2$: History,$3$: Civics,$4$: Geography,$5$: English,$6$: Economics,$7$: (Remaining book).The three books above English are History,Civics,and Geography.Since the arrangement is already determined by the given statements $(i)$ to $(iv)$,no additional information is required.

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