Guys i gave this year's papers and it interesting to note that Indo Pak paper was quite general in nature.For example I would like to know if and how anybody attempted the following questions:

Q.3. Elaborate the importance of Delhi as the centre of Muslim cultural advancement and bride of all cities in orient and its devastation during the Muslim rule by the invaders.

Q.6. Compare the South Asian plain society with the desert and mountain society invaders applying Ibn-i-Khaldun’s philosophy.

Please suggest any book or reference material that will help in answering the above questions because the books that I studied for the paper(K Ali ,S M Ikram) were not quite thorough in dealing with these questions.