CBSE Sample Papers for Class 9, 10, 11, 12 CBSE Sample Papers for Class 9, 10, 11, 12. OTBA Material. PDF Free Download. Class 10 MCQ 2021-2022 Class 10 CBSE Sample Papers 2023-24 PDF Class 12 CBSE Sample Papers 2023-24 PDF Class 9 OTBA Material PDF Class 11 OTBA Material PDF