Hello,

I hope you are doing well, You can get the JEE Advanced chapterwise previous year questions and answers in the sites like amzon and flipkart. But the fact is that you just cannot rely on the answers on of those books. Many answers you will find are wrong. But there is a book you can take - R.K. Malik's Newton Classes. The solutions are explained in details in the book. If possible you also take the Study Materials many institute provides.

I hope you find this information helpful. I wish you all the best for your future.

Good Luck