Delhi University (DU)

First, take out the print of the respective college with the course in which you want admission. Check your marks and match with the cut-off released by Delhi University. Go to the respective college with all the documents. Follow the admission procedure and pay the fee on the online portal of under graduation admissions tab on the Delhi University website.

Yes, you can but check that you satisfy the cut-off. First of all, cancel the admission and take all the certificates back and go to the respective college in which you want admission and follow the same procedure of admission.

Bachelor of Commerce (B.Com):
Eligibility:
The basic eligibility for admission to any of the B.Com programs is mentioned below. *Candidates must pass in Higher Secondary School examination from a recognised educational board
*They should have Maths and English as core subjects
*Minimum 50% marks are required at 10+2 level
*Although candidates from Science and Arts stream are also eligible to apply, those with Commerce stream are preferred
*There is no work experience required for the course.
However, students with work experience can also apply.

Yes, you can include physical education as your subject. But your 2.5% percentage deducted if you add physical education. For more information, visit the Delhi University website:
http://www.du.ac.in/index.html

No, you can't. You can take migration from one of the Delhi University colleges to another Delhi University college. You can't take migration from Meerut College to DU college. It is not possible. For more information, visit the Delhi University website.

Visit the following link-
Following courses are available in the SOL DU programme-
https://sol.du.ac.in/mod/tab/view.php?id=1380
1. English (A, B, C)
2. Hindi (A, B, C)
3. Punjabi (A, B)
4. Tamil (A, B)
5. Urdu (A, B).

No, there is no entrance test for this under graduation course.
Admission to this course is based on the 12 the marks which are checked against the cut-off released by Delhi University.
For more information, visit Delhi University's website.

Many colleges and universities situated in Delhi NCR region provide the same course. (Amity, SGT and many more)
If you have marks above 86% in best four and belong to general category, then you can wait for the next cut-off list of Delhi University.

Ramanujan College is under construction and some part is renovated. So, I suggest you to not go for Ramanujan college. Commutation method is not suitable. Go for another college which the nearest to you. Delhi University has more than 46 colleges which offer this course.