Exam

Yes, you are eligible for both JEE Mains and Advance.

Surely you are eligible to give the exam. But you will be disqualified in the document verification round at the time when you report to the college. Hence you should not give JEE Mains.

The only criteria is that you have to fill the form for counseling as per the notification by JOSAA and pay the required fee. Yes, OBC candidates get benefit of their category. Hence there are two ranks - general rank and category rank.

Hi,
It's not a very good idea for you that you repeat one more year. It will be wastage of time. Generally, what happens is students whose ranks are within 2000-5000 they want to improve their ranks so they repeat the year. You must sit in JEE Mains counseling if you want a college. Enroll yourself f

Hi,
JEE Advance is the examination which tests the overall preparation and analysis of a student. So a student must study from standard books. Here are the names of books:
Mathematics: IIT mathematics by Das Gupta and TMH Publication along with MTG Publication of past years papers.
Chemistry: Prakash B

Use COMEDK college predictor for predicting the colleges you can get based on your rank. Link is given below:
https://www.shiksha.com/b-tech/resources/comedk-college-predictor

Read newspaper daily for current affairs, as well as you will have to revise some of your NCERT books for general knowledge.
You must have a grasp in Reasoning, English, and some conceptual Mathematics.
And you should have to choose Arihant publication books for JAT.
(Delhi University BMS entrance test