Hii there,

Dear candidate hope you are doing well, the link mentioned below will provide you all the information about the eligibility criteria.

According to the official site, Group B requires Mathematics in 12th.

To know more: https://eci.gov.in/files/file/11927-filling-up-posts-of-deo-grade-d-deo-grade-b-and-deo-gradea-in-the-eci-on-deputation-basis/

Thank you!