some law universities accepting students with 77 % for law I have done medical in my 12 class
I am sorry but your question is not clear I am not able to understand what to you want to exactly know. If you are asking that in law does it affect which stream we are from let me make it clear to you no it doesn't not affect. The only criteria is that you must have scored more than 55%-66% in your 12th standard.
I hope I have answered your question and of there are more doubt fill free to drop a comment.
Best of luck.