CAT

For getting better MBA colleges, you must have to score above 98 percentile. All the best.

Yes, definitely, you are eligible for getting admissions in MBA and your score is quite great. You can get into tier 2 B-Schools.

Minimum 90 percentile would be good for you to get call from IIMs.

No, you can apply in final year.

CAT, CMAT, MAT, NMAT all the proceeding tests are deliberated by Amity Gwalior. In fact, with the common entrance exams' results Amity University conducts it's own AMCAT, where the students can perform well to get admission. If in case, they couldn't perform well in CAT etc. Amity University exam is followed by a GD and an interview at the end.

As per the basic eligibility criteria of CAT 2018, the management aspirants must have a Bachelor's Degree with minimum 50 percent marks in aggregate. University of Lucknow popularly known as Lucknow University offers degree, diploma and certificate programmes to aspirants at the undergraduate (UG), postgraduate (PG), MPhil and doctorate (PhD) level. Programmes offered at Lucknow University are in streams including Teaching & Education, Accounting & Commerce, Business & Management Studies, Law, Science, Humanities & Social Sciences, Mass Communication & Media, Arts (Fine/ Visual/Performing), and Medicine & Health Sciences

You have scored very less; you are not eligible for an MBA college. You need to score at least 70% to get admission in top MBA colleges.

Since you will be eligible to give your CAT exams in your final year, so it would be better if you start your preparation from the second year of your undergraduate study itself. For preparation, there are various books available in the market and/or on the internet, you can refer to those or if you need extra help then you can probably join coaching classes for CAT preparation.

You have very good chances to get a call from new IIMs. You can also expect calls from IITs, MDI Gurgaon, XIMB Bhubaneswar, etc.