cat 20 percentile acceptable by which colleges ?

At this percentile, you will not get the top B-schools of India, not even the average colleges. Though based on your mark, there are some B-Schools in India where you can get admission- Globsyn Business School Kolkata,  Aryans Group of Colleges Chandigarh, Aravali Institute of Management Jodhpur. But I will suggest you to write CAT next time or another competitive exams(CMAT, XAT, MAT etc.) for admission to MBA/PGDM.