Hey Kevallav

To prepare well for LLM entrance test for Mumbai University the first and foremost thing is to do self study.

To start with you need to study from these books- The Ultimate Entrance Guide to the LLB Entrance Examination 2020, M.A. Rashid and Nisa Fasil ,CSAT Simplified 2020- 23 Years GS Solved Papers with General Knowledge and Current Affairs, Disha Expert , Analytical & Logical Reasoning for CAT and other Management Entrance Tests, Peeyush Bhardwaj , High School English Grammar and Composition Book, Rao N, NDV Prasada Rao, D.V. Prasada and Mathematics for CLAT and AILET, LAWGICIANS.

Then you need to get ahead with soilving mock test papers and past year question papers.

Since the exam has a general knowledge and current affairs section hence reading newspaper is important and useful (if you do it, it will add to your strength in the exam). All the best.