Can I take admission in class 12 if I am studying in another school and want to take admission in 12 in katras college?
No, you can't take admission in another school in class 12th if you are pursuing your 10+2 from ISC or CBSE board. Several states boards allow their students to change their school in class 12th but majority of state boards have same policy as that of CBSE board.
I'll suggest you to check the official website of your board for the same.
Hope this helps.