Some Papers of JNU are Objective & some  are subjective, MA Sociology paper is subjective. You can prepare the topics to clear the exam given below:

1.Thinkers
o Karl Marx, Emile Durkheim, Max Weber, Georg Simmel, C. Wright Mills, George Herbert Mead, Claude Levi-Strauss
o G.S. Ghurye, M. N. Srinivas, Iravati Karve, Yogendra Singh, Andre Beteille, T.K. Oommen
2.Basic Concepts and Social Institutions
3.Tools and Techniques of Research Methodology
4.Social Structure and Social Change
5.Social Stratification
o Gender, Caste, Class, Tribe, Disability
6.Economy and Society
7.State, Polity and Society
8.Family, Marriage and Kinship
9.Religion
10.Environment and Society
11.Social Movements
12.Social Issues
13.Understanding Indian society
14.Modernization, Globalization and Development

You can also refer given below link for the information.

https://admissions.jnu.ac.in/prospectus/jnuee/SSS%201.pdf



Good Luck!