Dear aspirant hope you are doing well . As per my knowledge caste certificate of an candidate is must from SDO. and one of authority respectively

For all india counselling , you need caste  certificate be issued by any of the competent authorities provided below:

---) District Magistrate or Additional Magistrate or Ist Class Stipendiary Magistrate or sub-Divisional Magistrate or Taluka Magistrate or Executive Magistrate

----)Extra Assistant Commissioner (not below the rank of 1st Class Stipendiary Magistrate.)

----) Chief Presidency Magistrate or Additional Chief presidency Magistrate or Presidency magistrate.

----)Revenue Officer ( not below the rank of Tehsildar )

----) Sub-Divisional Officer of your area

The certificate issued by above authorities is nothing but central certificate. In other words, you need obc ncl central certificate.

Hope it's helpful thank you