Dear Aspirant,

DC Pandey is very good book for concept Clearing. And NCERT too is a very good book.

You should prefer the book which suits you the most. The book which you feel more comfortable and understanding will the right choice.

Now it's totally depends on you But both the books are good in their own way.

It is not necessary to read both the books but I should prefer that irrespective to which book you are preferring, you should at least do questions from both the books

Good Luck!!