Colleges in Delhi

Yes, you are eligible because there are many universities in India which allow you to come for admission if you have passed your previous degree.
Only a few campuses are there which allow for admission after taking exams like CAT and should have good marks in Bachelor's degree. But this doesn't mean that the door of every university is been closed.
You can enjoy MBA. So, just search a few top rank universities and take admission, but most of the private universities will allow for admission and there are some top rated private universities are also available.
Well, to be perfectly honest, I am sorry to say that most of the reputed institutes abroad consider your throughout achievements as a tool to determine your overall development and personality to judge you.
So, no matter in which graduation you got 49%, I am afraid it will be pretty difficult to get through.

In my opinion, NDIM is the best one among all the institutes, because unlike most other PGDMs and MBA programmes, PGDM at NDIM is unique as the students graduate with 'Dual Specialization' rather than 1 major and 1 minor specialization as in most other b-schools. MBA with two specializations multiplies the career opportunities and opens up wider options.
The faculty pool at NDIM is globally acknowledged and has remained associated with 19 international universities. For placement, the Corporate Resource Center/Placement Team of college maintains close contact with recruiters throughout the year plays an active role in connecting with the most senior professionals and inviting them to campus to bridge the industry- academia gap. Some of the recruiters were ABP News, Aditya Birla Group, American Express, Asian Paints, Axis Bank, Bajaj Electricals, Berger Paints, Bharti Paint, Bridgestone, ITC Ltd, iTV Network, JK Tyres, Johnson & Johnson, S&P Capital IQ, Zomato, etc. The average package for 2016-18 batch was Rs 4-5 lakhs per annum and the highest package was Rs 14 lakhs per annum. Also, the kind of exposure the institute provides by different live projects, foreign internships, industry visit makes you ready for industry.
With these qualities NDIM stands at the better position among them.

In my opinion, NDIM would be a better option. NDIM is the best one among all the institutes because unlike most other PGDMs and MBA programmes, PGDM at NDIM is unique as the students graduate with 'Dual Specialization' rather than 1 major and 1 minor specialization as in most other b-schools. MBA with two specializations multiplies the career opportunities and opens up wider options.
The faculty pool at NDIM is globally acknowledged and has remained associated with 19 international universities. For placement, the Corporate Resource Center/Placement Team of college maintains close contact with recruiters throughout the year plays an active role in connecting with the most senior professionals and inviting them to campus to bridge the industry- academia gap. Some of the recruiters were ABP News, Aditya Birla Group, American Express, Asian Paints, Axis Bank, Bajaj Electricals, Berger Paints, Bharti Paint, Bridgestone, ITC Ltd, iTV Network, JK Tyres, Johnson & Johnson, S&P Capital IQ, Zomato, etc. The average package for 2016-18 batch was Rs 5 lakhs per annum and the highest package was Rs 14 lakhs per annum. Also, the kind of exposure the institute provides by different live projects, foreign internships, industry visit makes you ready for industry.
With these qualities NDIM stands at the better position among them and also the fees of NDIM is much lower than Amity.
Hope, you find this helpful and feel free to ask any other query and all the best for your career at NDIM.