Dear Devnath Goswami,

Here is the official link of the syllabus of NIOS Bengali Medium. Click the link below.

NIOS Bengali Medium syllabus (https://nios.ac.in/online-course-material/sr-secondary-courses/bengali_medium_srsecondary.aspx)

All the best, Cheers!!!

Hello,

You can get the syllabus along with detailed information in their official site which I am sharing with you below.

https://nios.ac.in/online-course-material/sr-secondary-courses/bengali_medium_srsecondary.aspx

Hope this helps you.

Good luck!