CBSE Class 12 Economics board exam is mainly based on NCERT books. In order to score maximum marks in the CBSE board exams, it is recommended for the students of CBSE Class 12 to study NCERT Books thoroughly.
NCERT has published two books for CBSE Class 12 Economics.
Introductory Macroeconomics is one of the two books of CBSE Class 12 Economics.
You can view and download the Chapter 2: National Income Accounting of this book from the link given below.