- OAS Prelims Online Practice Test: Interior of the Earth
- OAS Prelims Online Practice Test: Earth and the Solar System
- OAS Prelims Online Practice Test: Hydrosphere
- OAS Prelims Online Practice Test: Atmosphere
- OAS Prelims Online Practice Test: Public Finance
- OAS Prelims Online Practice Test: First Phase of National Movement
- OAS Prelims Online Practice Test: Early Medieval India
- OAS Prelims Online Practice Test: Early Political Association
- OAS Prelims Online Practice Test: Political Parties and Elections
- OAS Prelims Online Practice Test: Akbar
- OAS Prelims Online Practice Test: Ecology and Environment-II
- OAS Prelims Online Practice Test: Genetics
- OAS Prelims Online Practice Test: Union Legislature
- OAS Prelims Online Practice Test: Panchayati Raj
- OAS Prelims Online Practice Test: Constitutional Bodies of India
- OAS Prelims Online Practice Test: Prehistoric Period
- OAS Prelims Online Practice Test: Sound
- OAS Prelims Online Practice Test: Rise of Extremists and Swadeshi Movement
- OAS Prelims Online Practice Test: Inflation
- OAS Prelims Online Practice Test: Ashoka
- OAS Prelims Online Practice Test: Emergency Provisions
- OAS Prelims Online Practice Test: Drainage of India
- OAS Prelims Online Practice Test: Fundamental Rights
- Question of the Day: Parliamentary form of Government
- Daily Practice Questions for OAS Prelims 2019: Set- 4
- Daily Practice Questions for OAS Prelims 2019: Set- 3
- Daily Practice Questions for OAS Prelims 2019: Set- 2
- Daily Practice Questions for OAS Prelims 2019: Set- 1
- OPSC OAS Prelims-2018 General Studies Paper-I Solved: Ecology and Environment
- OPSC OAS Prelims-2018 General Studies Paper-I Solved: Indian Polity and Governance
- OPSC OAS Prelims-2018 General Studies Paper-I Solved: Geography of India and the World
- OPSC OAS Prelims-2018 General Studies Paper-I Solved: Current Affairs and GK
- Inflation
- Ashoka
- Temples of Ancient India and their Architecture
- Akbar
- Pre-Historic Period
- Emergency Provisions
- Political Parties and Elections
- Panchayati Raj
- Constitutional Bodies of India
- Rise of Extremists and Swadeshi Movement
- Union Judiciary
- First Phase of National Movement
- Evolution
- Early Political Association
- Genetics
- Union Legislature
- Soils of India
- Public Finance
- Cell Reproduction
- Foreign Trade
- Bio Molecules
- The Living World- Cell
- Sound
- Properties of Matter
- Money and Banking
- Natural Vegetation of India
- Tribal and Peasants Movements
- Union Executive
- Fundamental Rights
- Drainage of India
- Socio-Religious Reform Movements
- National Income Accounting
- British Expansion in India
- Structure and Physiography of India
- Ecology and Environment
- Units and Measurement
- Economic Planning in India
- Introduction to Economics
- The Making of Indian Constitution
- The President of India
- Advent of Europeans
- Early Medieval India
- Sources of Indian History
- India: Size and Location
- Nature and Scope of Geography
- OPSC OAS Prelims-2017 General Studies-I Solved: Indian History
- OAS Prelims Environmental Ecology Practice Set-II
- OAS Prelims Environmental Ecology Practice Set-I
- OAS Prelims Indian Economy Practice Set-III
- OAS Prelims Indian Polity Practice Set-I
- OAS Prelims General Science Practice Set-I
- OAS Prelims-2016 Solved: Indian Polity and Governance
- OAS Prelims-2015 Solved: Indian Polity and Governance
- OAS Prelims-2016 Solved: History of India and Indian National Movement
- OAS Prelims-2015 Solved: History of India and Indian National Movement
- OAS Prelims- 2016 Solved: General Science and Technology
- OAS Prelims- 2016 Solved: Indian and the World Geography
- OAS Prelims-2015 Solved: General Science and Technology
- OAS Prelims-2015 Solved: Geography of India and The World