Can I get direct admission in any B-school without appearing for any entrance exam?

No, if you want to pursue MBA from all reputed colleges, you need to give MBA entrance exams. Also, the chances of getting a better package at end of MBA depends on the college you get. An entrance exam would be followed with Group Discussion and Personal Interview in some cases. CAT is a difficult

No. All reputed colleges select students based on their scores in any of the entrance exams.

It will be difficult to get into a top B-school without appearing for an entrance exams. The top B-schools of India needs valid exam score cards for admission. You can appear for CAT, CMAT, XAT, MAT, etc. CMAT and MAT are bit easier as compared to others.