Hey Amal

To be Eligible to take admission in JNU for MA in history course you need to have a Bachelor’s Degree in any discipline under 10+2+3 education pattern securing at least 50 percent marks in aggregate of the subjects. Considering this you seem to be eligible after pursuing Btech for thie course. Admission will be based on an entrance test. You can use the link below for other details.

https://www.jnu.ac.in/sss/chs-mainhistory

Best of luck