Hi Aspirant!

I would suggest you to start from the basics which you can do by first revising your under graduation syllabus of BA Economics. Then proceed to the syllabus as per the entrance exam of JNU or BHU. Once you are done with revision start solving sample papers and previous year papers for both exams. For the reference you can take help of following books:

• Mathematical economics by Hammond and Sydsaeter
• Introductory economics by Wooldridge
• Microeconomic Theory by Nicholson and Synder
• Macroeconomics by Olivier Blanchard

To know more, visit here:

How to prepare for JNU Entrance Exam 2020 - Tips & Tricks (careers360.com)

Thankyou!