The Primary Backward Classes can be divided into 3 different categories :
•The Scheduled Caste (SCs)
•The Scheduled Tribe (STs)
•Other Backward Classes (OBCs)
The Shudras, the Harijans and the Untouchables are referred to Scheduled Caste.
The members of the Forest Tribes, and Various other tribes are referred to as Scheduled Tribe.
The only group that comprises of the rest of the individual of the Backward Classes is the OBCs...