Hello,
Delhi university offers MA Economics on both Merit and Entrance basis but to be eligible for merit basis, one has to do BA hons economics from Delhi University. Since you have done B.COM (//B.COM) hons from a recognised university, and passed with first distinction, you are eligible to give entrance exam for MA economics.
https://university.careers360.com/articles/du-pg-cutoff
In order to get top colleges, you need to score well in the entrance exam. The syllabus for entrance exam is written below
All the best!
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile