Hello Abhay,

For almost all the competitive exams you have mentioned the Syllabus is same, and personally i prefer be thorough with NCERT textbooks. All qestions will be based on the topics in NCERT textbooks as per rules, but not same type every time. The theory, and principles are same, but it's application and way of questioning will be different. For reference pupose you can use MTG books, GRB books and Arihant books. Apart from that I suggest to practice more and more problems, but of various kind of topics of same aspect. Concentrate, Practice, Understand and Correct your mistakes every time. This is common strategy for all the Competitive exams. Hope you get it.

Feel free to ask. Thank you.

Beat of luck!!