Dear Applicant,

If you are asking in general than I would suggest you NCERT BOOKS. Which are really helpful for simple and easy understanding.

But for enterance exam point of view try Moderns ABC series

physics

Concepts of Physics by- HC Verma

New Millennium Physics Class-11 by Dinesh

Understanding Physics by D C Pandey

Chemistry

ABC of Chemistry by Modern Publications

Physical Chemistry, Organic Chemistry and Inorganic Chemistry by O.P. Tandon

Biology

ABC of Biology by Modern Publication