Hi Alok
You may refer to the Official Bihar Board Open Schooling Syllabus link as issued by the board.It is advised to visit the official website for getting the latest updates from the board.
http://www.bbose.org/TMA/XII%20Syllabus%20(Short)%20in%20PDF.pdf
Hope this helps
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile