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The question is very interesting. One can pursue M.Com degree via regular mode and also through correspondence mode. Benefits of doing M.Com through regular course:-
The student who does M.Com as a regular course will get an opportunity to attend class room sessions. They will get more exposure to practical sessions as well. They will get proper guidance under experienced teachers or faculty members that will help them to be thorough with the subjects covered in course curriculum. Moreover, they will interact with the class mates that will help them refresh their mind which helps them to get along with the studies. Benefits of doing M.Com through correspondence course:-
For students who have difficulty in attending regular classes, they can pursue their degree through correspondence only. The students with family constraints or those who are working and wish to pursue academic degree M.Com can fulfill their wish by doing the degree through correspondence mode. Students can save the time and money on transportation and they can undergo this course sitting in their homes. There will be options to access the class notes via post or else through online mode as well. The persons who are presently working need not loose their job for doing this degree. Finally it is advisable for a student to do M.Com through correspondence mode only if he has work experience. Doing M.Com through regular mode is better for a candidate who has no work experience. For a fresher to seek job in reputed firms, the degree earned through regular mode is more advantageous. Best of luck.

Just go through previous year entrance question paper it's very easy and I'm mentioning some text here just read them.
Political Theory -By Andrew Heywood.
Key concepts in political science -By Andrew Heywood.
India since independance -By Bipin Chandra.
From Plassey to partion and after (Selected Chapters) -By Sekhar Bandyopadhyay.
Indian Government and Politics -By B.L. Fadia.
Introduction to the Indian Constitution -By D.D. Basu.
The Indian Constitution -By Granville Austin.
The Oxford Companion to Politics in India -By Jayal Mehta.
Comparative Politics -By J C Johari.
Comparative Politics -By V N Khanna.
Western Political Thought -By Nelson.
Political Thought -By C L Wayper.
Western Political Thought -By O P Gauba.
Makers of Modern Indian -By R C Guha.
Indian Political Thought -By Thomas Panthom.
Indian Political Thought -By Roy & Singh.
Indian Politics -By Singh & Saxena.
The Globlizzation of world politics -By Baylis Smith.
Theories of International Relations -By Kenneth waltz.
Global Politics -By Andrew Heywood.
International relations -By Gosh.
The Oxford Handbook of Indian Foriegn Policy -By Malone Mohan Raghwan.
Does the elephant dance -by Malone.
Politics -By Andrew Heywood.
Foundation of Comparative Politics -By Kenneth Newton & Jan W. Van Deth.
Cases in Comparative Politics -By Patrick H. O Neil, Karla Fields & Don Share.
Essential Reading in Comparative Politics -By Patrick H. O Neil, Ronald Rogowski.
Introducing Comparative Politics -By Stephen Orvis Carol Ann Drogus.
Current Debates in Comparative Politics -By J. Tyler Dickovick & Jonathan Eastwood.
Comparative Politics Integrating Theories, Methods and Cases -BY J. Tyler Dickovick & Jonathan Eastwood.
Comparative Politics Classic and contemporary readings -By J. Tyler Dickovick & Jonathan Eastwood.
AP Comparative Government and Politics: An essential course book -By Ethel wood.
The Oxford Handbook of Comparative Politics -By Carles Boix & Susan C. Stokes.