CBSE Class 12 History Pre-Board Sample Paper ... Both A and R are true and R is the correct explanation of A. 14. The book written by Al-Biruni is..... A. Both (A) and (R) are ...

NCERT Books for Class 12 Biology: The Central Board of Secondary Education (CBSE) Class 12 Biology board examination predominantly relies on the comprehensive content found in the NCERT textbooks.