B.A

What kind of Diploma Certificate you wants please clarify in details. Generally B.A. Is 3 years of duration course and does not issue any kind of Diploma certificates.

Yes you are eligible for B.A. (Hons. ). Economics. The eligibility criteria of DU's is given below for an idea. Eligibility criteria :
1. An aggregate of 45% marks in the qualifying examination I. e 10+2. The merit shall be determined on the basis of one language and three best academic/elective subjects.
3. The applicants must have studied and passed Mathematics at the qualifying exam for admission to B.A. (Hons) in Economics.

Hello Rukmini, I think you can. This is so because many states including Karnataka have given Diploma the equivalent of 12th and for joining any graduation course like B.A. Twelfth is a must. The institute from which you have completed your Diploma will be in a position to guide you about obtaining this equivalence Certificate. Once you have it with you then you can go for any degree for which eligibility is passing of 12th. Alternatively you can download the brochure of k s o u and SEE if they accept Diploma in lieu of 12th. Best wishes to you.

If your clear with goal I. e the field of career you want to expertise and aspire, it will be more easy to make decision. It is you who can make the better choice
If B.A. ( History) is the means by which you can achieve your final goal. I will suggest B.A. From either of the college with suitable combination in allignment with future goal. If B.A. Economics suit you, it is more job oriented.