Hello student Byjus is a third party portal and we don't have details about that, I'll suggest you to subscribe careers360 knockout package for preparing and qualifying the entrance examination its very helpful and user-friendly. Refer to the link mentioned below - https://learn.careers360.com/knockout-viteee-april/

Prefer NCERT to build your basic concept and make sure you do each and every example and exercise questions of Ncert before jumping to a reference book. After completing ncert thoroughly refer to your coaching material or any reference book as mentioned below - Concept of physics by HC VERMA, OP TONDON Chemistry, Rd Sharma for Mathematics.

Feel free to comment if you have any doubt

Good luck