Will My low score in 12 affect my chances of interview call from iim a, b,c...

The selection is based on credit score formula that the colleges have which they hardly disclose. If your exams score is good, and your Group exercise and PI( which has major share of credits in all colleges) goes great, the low scores of 12 wont be able to stop you.I would suggest tou to do some courses too by the side to enhance the cv. Take their sight away from your score and put it on something else that you want to show off. Try alison courses. They have free courses.