Economics Eligibility

No, you can't take economics, but you can take English in BA. You are not eligible for economics, because for that you must have math or economics at 10+2 level.

If you want to do BA in economics from DU then maths is a mandatory subject. So, you are not eligible to do BA in economics from DU.

Hello Rajesh,
I understand and appreciate your interest in pursuing Bachelor of Science (B.Sc) in Economics. To assist you in choosing the colleges to pursue the same and admission details, kindly refer to the link below for more information on the colleges:
https://goo.gl/V0oTu8
I hope this answers your question to your satisfaction. If so, kindly upvote this answer. If you have any further questions, kindly revert.

You need to pass your 12th with 60% and appear for NMIMS exam.

Hi,
You must hold a Master's degree, take the GRE and submit a writing sample. Get in touch with one of the department faculty, it important that they know you first before you submit the formal application. Details can be found on the department website:
https://gsas.harvard.edu/programs-of-study/all/economics

For most of colleges to study economics honors, you need to opt for mathematics as a subject in class 12th. The cutoff will depend on where you want to study. In Delhi colleges, it is almost 99% for reputed colleges. That does not mean that you cannot study in other colleges. You need to elaborate your question.