Hello,

The important topics of KVPY SB Stream for physics, chemistry and biology are as follows;

• Physics; Mechanics, Ray Optics, Electromagnetism, Waves
• Chemistry; Physical Chemistry, Atomic Structure, Chemical Bonding, Chemical Energetics, Organic Chemistry, Stoichiometry and Gaseous State
• Biology; Biomolecules, Molecular Genetics, Cell Biology, Biotechnology

NCERTs are the best books for preparation of KVPY, other than this some of the reference books are

Physics

• Fundamentals of Physics by David Halliday
• Robert Resnick, Jearl Walker; Concept of Physics by DC Pandey
• Tata Mc. Graw Hill’s Book by HC Verma

Chemistry

• Moderns ABC of Chemistry for Class – XI With CD by Modern Publishers
• NCERT Physical & Organic Chemistry by OP Tandon

Biology

• Biological Sciences by Taylor Green and Stout by Cambridge Publications
• Elementary Biology (Volume – 1) by K.N. Bhatia M.P. Tyagi; Publisher: Trueman

Be thorough with the syllabus of 10,11th, 12th,  make short notes if requires, focus on conceptual understanding first, and then practice questions accordingly, You can also  go through previous year papers at https://school.careers360.com/articles/kvpy-sample-papers