For SA stream- class 10th NCERT and class 11th also if you can. For SX- NCERT class 11th and 12th. Truman's elementary biology is the best if you can.
in my choice Trueman's biology book and for 12 part refer to 12 ncert book
ncert book are best books forever don't run for other books
Ncert books are the best for all competitive exams.