📘 About This Master Index

This page is the central archive of official UPSC Prelims GS Paper-I answer keys, systematically organized across examination eras.

The entire Prelims GS-I journey has been structured into four conceptual zones for clarity, continuity, and long-term preparation value:

🏗️ The Four Zones of GS-I Prelims

🟨 Modern Edifice (2014–2025) — ✅ Active

The most relevant and high-yield zone for UPSC 2026 and upcoming attempts.
Each year here is presented as a stand-alone Pillar, containing:

• Full GS-I paper (Q.1–100)
• Consolidated official answer key tables
• Clean, exam-ready structure

➡️ This zone is fully live and forms the current foundation.

🟦 Transition Zone (2011–2013) — Coming Soon

A critical bridge phase where:

• Static–dynamic balance shifted
• Elimination logic began dominating
• Modern question framing started emerging

🟩 Millennium Block (2000–2010) — Coming Soon

An era reflecting:

• Core static dominance
• Concept-heavy questioning
• Repeated syllabus fundamentals

(Ideal for strengthening conceptual roots.)

🟥 Vintage Camp (1979–1999) — Coming Soon

The formative years of Prelims GS-I:

• Source-driven questions
• Minimal ambiguity
• Strong linkage with standard textbooks

Why the Vintage Camp Still Matters

A significant number of questions asked in State Civil Services, PSI, Police, SSC, and other competitive examinations are direct lifts or close adaptations from UPSC’s early Prelims era (1979–1999).
In several instances, diagrams, options, phrasing, and factual structures are replicated in toto.

This makes the Vintage Camp not merely historical, but a high-yield source zone for aspirants targeting multiple examinations simultaneously.

(Preserved for depth, clarity, and academic grounding.)

🎯 How Aspirants Should Use This Archive

• Start with the Modern Edifice (2014–2025) for immediate exam relevance
• Use the Pillars to verify answers, detect trends, and practice elimination logic
• Classroom-style explanations are being layered pillar-by-pillar, beginning with 2025

⚠️ Where UPSC has officially dropped or nullified questions, they are marked as 0 / Not Evaluated, exactly as per the final keys.

🧭 Design Philosophy

This archive is not a coaching handout.
It is a permanent reference infrastructure — built to grow, not to exp

The Edifice: Active

The Transition Zone: Coming Soon

The Millennium Block: Coming Soon

The Vintage Camp: Coming Soon