All About OPSC OAS Examination 2020
What’s New?
- OPSC General Studies (Main) Paper I & II: 2nd Edition by BK Publication
- OPSC History Optional: India & Modern World by Brajabandhu Mahanta
- Current Affairs for OAS Prelims 2020: Defence News
- Current Affairs for OAS Prelims 2020: Science and Technology
- Current Affairs for OAS Prelims 2020: National News
- Sadan of Jharkhand