a. Both western and eastern regions of the country were Muslim majority provinces, which could not be joined together. So, the state of Pakistan would comprise East and West Pakistan, which was to be separated by the long geographical expanse of India.
b. The domination of Urdu language over East Pakistan, which Bengali Muslims in East Pakistan referred to as the cultural domination, brought discontentment in the eastern region. Moreover, it was difficult to manage and administer two separate territories.