CBSE 12th

Hello Aditya,
You can go for any college of DU, who offer B.Com (P), but without Maths, you cannot apply for B.Com (H).

You can apply for medical exam like NEET, AIIMS, and JIPMER to study MBBS. Apart from this, you can apply for para medical course like B.Pharma, BPT. For this, every state has their own entrance. You can check information about those courses in your state. Or, you can also read those courses privately.

Yes, you can apply for B.Sc Maths. Forms will be out in May.

No, there is no limit, but you should get a decent score.

The eligibility criteria for B.Sc in Maths is that student must have passed in class 12th with Science stream and should have at least 50% marks or 60% marks as per different universities norms.

For engineering courses, Maths is an important subject to get admission. Without Maths as a subject, one cannot get admission for engineering courses. For Diploma courses also Maths is important.

Hi Manjinder,
The question is quite confusing. I failed to understand what you want to study in USA. Well of course, if you want to apply to an undergraduate course, your class 12th performance is the main requirement. Your percentile in class 10th, class 11th and class 12th will be of critical importance. Even for Masters, they will need your class 12th percentage, but your undergrad percentage will be given more importance. So, yes basically you must qualify and earn the basic credibility to study in USA and all countries abroad.