You only need to read these 6 NCERTs for UPSC prelims:- 1- 4 geography NCERT of classes 11 and 12th 2- Ancient history NCERT- can read any NCERT(old

You only need to read these 6 NCERTs for UPSC prelims:- 1- 4 geography NCERT of classes 11 and 12th 2- Ancient history NCERT- can read any NCERT(old