Can any senior guide me about the topic of "Muslim nationalism in South Asia and its implication, the role of Quaid and Iqbal" in the colonial era. . Which book or source would you recommend for this particular topic. It lies in Paper II of political science.

Normally recommended books are either not covering this particular topic in-depth or forget to mention it.

The shortage of time prevents me from doing thorough book and internet searching.

Muslim nationalism refers to idea of nationalism founded on the tenets of Islam. The idea so referred is Muslims struggle for separate socio-political identity on the basis of Islam, that led to Pakistan. You can present many arguments and movements that muslims carried out under such banner. Khilafat movement, formation of AIML and other political maneuvers were cause and product of this nationalism.
Role of Quaid and Allama Iqbal is prominent one. You can sketch out quaid's struggle and Iqbal's two nation theory and political addresses under this head.
Just for ease, present pre-partition struggle of muslims under this heading and this will be done.
If you have covered pre-partition part of Pak.Affairs thoroughly this won't be a deal at all.
As for books, most of Pak.Affairs books cover this.
Hope it helps!