ISC

When you take admission in a university, the board through which you cleared your 10+2 does not matter. The difference between the two boards is in the difficulty level. If you choose CBSE, the difficulty level is much lesser than that of ICSE. So choose the board on the basis of the pressure you are willing to take.

Yes, you will be allowed. Pre-boards are a preparation for your board. Even if you do not perform well in pre-boards, it will still give you an idea on how to prepare for your boards.

CBSE is a bit better because there curriculum is very simple.

Yes, you can get.

Hello dear
I am pleased to have connected with you. Kindly check out this link for all kinds of information
https://www.shiksha.com/science/colleges/mathematics-colleges-Ranchi.

Hi, I have completed my 10th and 12th from ISC board and there are students who got failed in pre boards and they are told by teachers that they will not be allowed for further exams but they were allowed afterwards. Still, you can confirm it from the teachers with whom you have a good connection. Best of luck.

Hello Aryansh Shukla, Normally speaking no government or government aided college will give admission based only on 12th score. Exception is Tamil Nadu where all admissions are based on 12th marks. But you can seek admission in private engineering colleges or deemed to be universities against management quota. For this, you will have to approach them individually. Best wishes to you.

Hi, you have left the query half way. But it's okay. If you have got admission in a private deemed to be university, then you need NIT worry about your fail in Maths in +2 level. Best wishes to you.