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The correct answer is option (c): 2 and 3, only. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
This question was asked in UPSC CSE Prelims 2006, GS Paper 1, as Question 64. It falls under Science & Technology > Space Technology & Astronomy.
This question is rated "moderate". It requires sound conceptual understanding of the topic.
UPSC has asked 69 questions from Space Technology & Astronomy (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.