Delhi

Don't wait for BC category, just do your study.
It category can go down only 3 to 5 percent than general category.

Hi,
With 121/200 marks in NATA exams 2019 and 77% in your class 12th, you can apply to a many colleges in Delhi.
MS School of Planning and Architecture
Vast Kala Academy
Indira Gandhi Delhi Technical University for Women
University School of Architecture & Planning Guru Gobind Singh Indraprastha University etc.

The fees varies college to college. The cost to become a pilot in Delhi, is very high, minimum INR. Rs.12 Lacs.

Hello Jainy,
You may use the college predictor tool from the link below to know your chances of getting the colleges near Madhya Pradesh and Delhi, with your JEE Main score :
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor.

With 74%, it is difficult to get admission in Delhi University. You can try for Amity or IP University with the above percentage.

Hello,
I can't be sure that you can get admission in this college, but there are chances to get in.

You can get your OBC certificate only from Bihar because for getting OBC certificate, you need various other certificates. State eligibility just depends on from where you have given your class 12th.

Hi,
As your rank in JEE Mains exam is 87535, so it will be very difficult to get a seat in DTU in first, second or third round. But, you may get a seat in spot round counselling. So, participate in the counselling accordingly. Best of luck.