Official Answer Key & Detailed Solution
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Correct Answer: Option (A) — 2, 3, and 4
Concept & Option Breakdown
Standard Reference Verified- Pair 1 is incorrectly matched: Idukki is a major hydroelectric project built on the Periyar River in Kerala, not a thermal station.
- Pair 2 is correctly matched: Sabarigiri is a major hydroelectric project located on the Pamba River in Kerala.
- Pair 3 is correctly matched: Ghatprabha is an irrigation project on the Ghatprabha River in Karnataka.
- Pair 4 is correctly matched: Ramganga is a multipurpose dam project in Uttarakhand.
Eliminate Pair 1 immediately because Idukki is one of India's most famous arch-dam hydroelectric projects, leaving option (a) as the only viable answer.
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