Buy Books for OPSC OAS Mains 2020 by Brajabandhu Mahanta
- OPSC History (Optional) India & Modern World (Paper – I and II)
- OPSC General Studies (Main) Paper I & II
All About OPSC OAS Examination 2020
What’s New?
- OAS Prelims 2020 Rapid Revision (30 Days): Physical Geography (Day-5)
- OAS Prelims 2020 Rapid Revision (30 Days): Modern India (Day-3)
- OAS Prelims 2020 Rapid Revision (30 Days): Medieval India (Day-2)
- OAS Prelims 2020: Current Affairs-III (Free Test)
- OAS Prelims 2020 Rapid Revision (30 Days): Ancient India (Day-1)
- OPSC General Studies (Main) Paper I & II: 2nd Edition by BK Publication
