CBSE

12th marks is not the major criteria in selection of a good college, performing well in the entrance examinations only will help you out in getting a good college.

Hi Imtiyaz,
Yes, you are eligible to take admission for UG courses in Delhi University. The eligibility condition for UG courses are:
Candidates should be qualified in 10+2 Board or equivalent examination. They must have obtained at least 45% in aggregate of all subjects.
Further, for different courses, you need to clear the cut-off for admission.

Hi,
By clearing +2 certificate, you can do first Diploma Engineering followed by B.Tech in lateral entry in 2nd year. After B.Tech you can do MBA/PGDM cracking competitive exam for management entrance. But if we consider practical implementation of above route for you it is, though not impossible but difficult unless you become really serious, sincere and methodical in your study.

It usually comes out online in the mid of August. The last date is 15th Sept. Check the official website for more details.

You don't have to reappear from open school. Two chances are given during which you can reappear from the regular board.

Hi,
If you want to study Bachelor's degree, your academic record from 10th to 12th will be checked. Change of board is fine and I don't see any reason why it should have a negative impact on you admission. You must meet the admission requirements importantly, have good grades and take the IELTS.

Yes, of course, you can but should be focused.
All the best.

Hi Gurjot,
Do whatever interests you. Moreover, it is not mandatory to go abroad for higher studies. If you don't know what you want you should study here and find out your interest.

Of course, you can appear for the exam since the only requirement to be eligible for JEE exam is to pass 12 from PCM. That set. Best wishes!