Hey Reshmi, If you are solving RD Sharma and use Pathfinder as a reference, then it is sufficient. All alone it is not sufficient because the theory of chapters is not very elaborated. You can use it as a reference book. In this book the most important thing is previous year paper which you must go through while preparing.

So I hope this helps to you and all the best for your future.

Hello student arihant pathfinder book for NDA is not recommend by teachers and toppers.

I request you to please 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 -

1)Rd Sharma Mathematics

2)Concept of Physics by HC VERMA

3)Arihant Practice Book for Jee main

4) OP TONDON CHEMISTRY

You can also subscribe to careers360 knockout package for preparing and qualifying the entrance examination, it offer you 100 percent money back guarantee if you do not qualify.

Refer to the link mentioned below - https://learn.careers360.com/knockout-jee-main-april/

Feel free to comment if you have any doubt

Good luck

PRACTICE MAKES A MAN PERFECT

Yes if you want to practice the question than you can practice from anywhere but there is a lot of difference in the exam pattern so the questions difficulty will be very different in  both the exams.

All the best