IIM Calcutta - Indian Institute of Management

As of now, just be consistent in your efforts and try to score as high as possible in CAT. That should be your prime focus. Interview and selection should be a secondary concern to you but I will mention a few insights.
10th and 12th marks are of concern but if you get the interview call, prepare well for it. You must showcase some achievements apart from academics and must have full knowledge about it as they will ask you in detail about it. Apart from that, do maintain polite behavior as there are people from the Organisational Behaviour area taking the interview. Make sure your answers are logical and have proof or fact attached to it. I think with this you can definitely crack any IIM.