I answered 210 questions in B.arch and scored 340 marks in boards. What will be my rank and which college will I get?

First of all congratulations on securing such a good scoring. You may get a seat in a very good college also, depends on the higher ranks submitted, here is a link for all approved architecture colleges across India - https://www.coa.gov.in/index1.php?lang=1&level=0&linkid=25&lid=26