(i) There are seven books,one each on Psychol | vedclass

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(D) Step $1$: Determine the initial order of the books from top to bottom.From $(ii)$ and $(iii)$,the top three books are: $1.$ Sociology,$2.$ Educati

Vedclass · Accepted Answer

None of these

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(D) Step $1$: Determine the initial order of the books from top to bottom.From $(ii)$ and $(iii)$,the top three books are: $1.$ Sociology,$2.$ Education,$3.$ Accountancy.From $(iv)$ and $(v)$,the remaining books are Economics,Psychology,and Hindi. Since Economics is immediately above Psychology and Hindi is immediately below Psychology,the order is: $4.$ Economics,$5.$ Psychology,$6.$ Hindi.The remaining book is English,which must be at position $7$.Initial order: $1.$ Sociology,$2.$ Education,$3.$ Accountancy,$4.$ Economics,$5.$ Psychology,$6.$ Hindi,$7.$ English.Step $2$: Apply the interchanges.- Sociology and English swap: English is at $1$,Sociology is at $7$.- Accountancy and Hindi swap: Hindi is at $3$,Accountancy is at $6$.- Education and Psychology swap: Psychology is at $2$,Education is at $5$.New order: $1.$ English,$2.$ Psychology,$3.$ Hindi,$4.$ Economics,$5.$ Education,$6.$ Accountancy,$7.$ Sociology.Step $3$: Identify the book between Psychology and Sociology.In the new order,Psychology is at position $2$ and Sociology is at position $7$. The books between them are Hindi,Economics,Education,and Accountancy.Since none of these are in the options,the correct answer is None of these.

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