Official Answer Key & Detailed Solution
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Correct Answer: Option (B) — 2 and 3 only
Concept & Option Breakdown
Standard Reference VerifiedPair 1 is incorrectly matched: Cassini-Huygens was a joint mission by NASA, ESA, and ASI to explore Saturn and its system (including landing the Huygens probe on Titan), not Venus.
Pair 2 is correctly matched: MESSENGER (MErcury Surface, Space ENvironment, GEochemistry, and Ranging) was a NASA spacecraft dedicated to orbiting and mapping Mercury.
Pair 3 is correctly matched: Voyager 1 and 2 were launched in 1977 to explore the outer solar system (Jupiter, Saturn, Uranus, Neptune) and have entered interstellar space.
Cassini is famously associated with Saturn and Titan. Identifying that Pair 1 is incorrect immediately eliminates options (a), (c), and (d).
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