Prelims Test Series 2025 HISTORY OPTIONAL COURSES

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INSIGHT UPSC QUIZ

Modern India

Ancient India

Medieval India

Art and Culture

Basics of Indian Economy

Miscellaneous

Monetary and Fiscal Policy

Economic Concepts

Agricultural Sector

Industrial Sector

Banking in India

General Science

Information Technology

Space Technology

Biotechnology

Defence

Nanotechnology

Miscellaneous

Miscellaneous

Economic and Social Geography

Map-Based Question

Physical Geography of India

Physical Geography of World

Making of Constitution

Local Self-Government

Fundamental Rights

Extra-Constitutional Bodies

Miscellaneous

Constitutional Amendment

Union and State Legislature

Preamble

Union and State Executive

Indian Judiciary

Cultural Dimensions

Citizenship

Union and its Territories

Emergency Provisions

Constitutional Bodies

DPSPs and Fundamental Duties

Centre and State Relations

Our Environment

Biodiversity

Miscellaneous

Treaties and Conventions

Ecosystem Concepts

Climate Change

General Knowledge

:

GS Geography Physical Geography of World

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Q.

The core of the earth is also known as:

(A)

Lithosphere

(B)

Mesosphere

(C)

Barysphere

(D)

Centrosphere