Official Answer Key & Detailed Solution
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Correct Answer: Option (A) — 1, 2, 3 and 4
Concept & Option Breakdown
Standard Reference Verified• Statement 1 is correct: Up to that point in time (2002), all operational INSAT satellites had been launched using foreign commercial launchers (such as Ariane from Kourou or Delta from Cape Canaveral). • Statement 2 is correct: The Polar Satellite Launch Vehicle (PSLV) was specifically developed and utilized to deploy the Indian Remote Sensing (IRS) series of satellites into sun-synchronous polar orbits. • Statement 3 is correct: The indigenous cryogenic upper stage (CE-7.5) was developed for the third stage of the Geosynchronous Satellite Launch Vehicle (GSLV). • Statement 4 is correct: GSAT-1 was launched on GSLV-D1 in 2001 with experimental transponders to demonstrate digital audio broadcasting, internet services, and compressed digital TV transmission.
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