haw we find previous year question paper MA economy for JNU, BHU, DSE and JMI
For JNU you can get the previous year question papers from the link below:
https://admissions.jnu.ac.in/searchquestionpaper.aspx
For BHU you can get the previous year question papers from the link below:
http://bhuonline.in/old-qus-paper-entr.html
For DSE & JMI there are no specific official website for download nor any perfect book.
For JMI or DSE I would recommend you to search on Google or just contact your seniors who had prepared for this for previous year question papers.
I hope this answer helps. All the very best for your future endeavors!