hi,

TELUGU ACADEMY TEXT BOOKS and NCERT TEXT BOOK are the primary source of study clear in basic concepts. After basics from text book then move on to some standard books like

for Physics

1. Concepts of Physics (Volume – 1)
2. Concepts Of Physics (Volume – 2)

for Chemistry

1. OP Tandon
2. EAMCET Chemistry Chapterwise 25 Years Solutions & 5 Mock Tests

for Mathematics

1. EAMCET Mathematics (Andhra & Telangana) Chapterwise 25 Years’ Solutions and 5 Mock Tests.