UPSC CSE Prelims 2002 Q139 — Science & Technology PYQ with Answer

With reference to Indian satellites and their launchers, consider the following statements:

1. All the INSAT-series of satellites were launched abroad

2. PSLVs were used to launch IRS-series of satellites

3. India used the indigenously built cryogenic engines for the first time for powering the third stage of GSLV

4. GSAT, launched in the year 2001, has payloads to demonstrate digital broadcasts and internet services

Which of these statements are correct?