arfken is the best book ,it's language , question everything is good.. Erwin Kreyzig is good book but I don't like so I suggest you to go through arfken which is strongly recommend...
Fir jam purpose, Kreyszig is more then enough, but if you find some topic is not given in much detail in Kreyszig, then you should follow Arken. Which is a higher level book, even ...
The best Book for Mathematical physics is Erwin Kreyszig, this book contains everything you will need for your JAM preparation. it is a highly recommend book with lots of question...