Hello aspirant,

You can get OTBA Study Material release by CBSE, using below mentioned link. For these material CBSE question paper will be given.

https://www.careers360.com/news/Education/CBSE-Released-Study-Material-for-Open-Text-Based-Assessment-OTBA

Know how to prepare for CBSE 12 th standard exams, using below mentioned link.

https://school.careers360.com/boards/cbse/cbse-class-12-preparation-tips

I'm providing you with useful links for CBSE board exam preparation.

Link for NCERT Books for Class 12.

https://school.careers360.com/ncert/ncert-books-for-class-12

May this information was helpful to you.

Best of Luck!!