Class 10 cbse deleted syllabus 2023 24 sst July 8, 2019 16 32 64 128 Syllabus of class 10 cbse 2022-23 Syllabus of class 10 english 2022-23 2022-23 class 10 syllabus It code 402 class 10 syllabus 2022-23 Cbse 2023 12 exam date