Hello, Karnati
The terms Economically Weaker Section (EWS) and Economically Backward Class (EBC) are not to be treated equally in India.
For EWS--A state government is authorized to extend the income limit further for candidates seeking reservation under EWS category in the state-owned colleges and state government's jobs.
For EBC--This service is used to get the EBC Certificate which can be used for Scholarship in Education and reservation in Employment under Govt. it can be a class certificate, is issued to those who fall below the poverty line.
Hope this helps!
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