1. There are seven books one each on Psychology, Hindi, English, Sociology, Economics, Education and Accountancy, lying on a table one above the other.
  2. Sociology is on the top of all the books.
  3. Accountancy is immediately below Education which is immediately below Sociology.
  4. Economics is immediately above Psychology but not in the middle.
  5. Hindi is immediately below Psychology.

If Sociology and English, Accountancy and Hindi and Education and Psychology interchange their positions, which book will be between Psychology and Sociology ? 


A. Accountancy
B. Psychology
C. Hindi
D. Economics
E. None of these
Answer: C . Hindi


Sociilogy is on top of all books, Education is below Sociology. Accountancy is below Education.
Economics is above Psychology and Psychology is above Hindi.
Economics is not in the middle. So, in the middle lies the seventh book  i.e. English.
Thus, the sequence from top to bottom is :
Sociology, Education, Accountancy, English, Economics, Psychology, Hindi.

The new sequence formed on interchanging places is English, Psychology, Hindi, Sociology, Economics, Education, Accountancy.
Clearly, Hindi is between Psychology and Sociology.