B.Com

Hi,
Most of the reputed universities look for BA/B.Sc economics as a pre-requisite but maths (Hons.) students or graduates with maths as a subject are also eligible. The best ones are:
1. Delhi University
2. JNU
3. Loyola Chennai
4. Mumbai University
5. Bangalore University
IGNOU offers MA in economics with graduation in any subject.

Yes, it would be good to do MBA from top B-schools.

IP University conducts B.Com (Hons) degree course. Admission to B.Com is through CET. Degree CET code is 146. Eligibility criteria for B.Com (Hons) is as 50% in aggregate in class 12th examination / senior school certificate examination of C.B.S.E ., as minimum marks for admission to B.Com with pass in five subjects (one language and four elective subjects) or an examination recognized as equivalent to that.

iitm offers mba in tourism management

Majority of syllabus of B.Com (P) and B.Com (Hons) is same. B.Com (P) gives an overview of various subjects whereas same course in (Honors) has more depth and content. In B.Com (P), you cannot specialise but in Honours degree student can specialise. B.Com (Hons) is now a de-facto a standard accepted degree for jobs. Cut off for B.Com (Hons) is higher in comparison to B.Com(Pass) degree.