Which are the best reference books for PCM of 11th?

Hi, you can't deny the fact that NCERT books are best. Try to solve numerical etc. from them, but according to me theory cannot be learned much from NCERT (especially physics), but you can totally rely on NCERT for chemistry. And, when you talk about reference books, according to me, you can go for

NCERT books are always best for 11th class PCM. You can also study from the online-youtube video for any particular topic, that you want to learn.