With reference to India's satellite launch vehicles, consider the following statements: 1. PSLVs launch the satellites useful for Earth resources monitoring whereas GSLVs are designed mainly to launch communication satellites. 2. Satellites launched by PSLV appear to remain permanently fixed in the same position in the sky, as viewed from a particular location on Earth. 3. GSLV Mk III is a four-staged launch vehicle with the first and third stages using solid rocket motors; and the second and fourth stages using liquid rocket engines. Which of the statements given above is/are correct?

Statement 1 is correct because the PSLV is primarily used for Earth observation and remote sensing satellites in Sun-synchronous orbits, while the GSLV is designed to carry heavier communication satellites into Geosynchronous Transfer Orbits. Statement 2 is the most tempting error, but it is incorrect because satellites that appear fixed in the sky are in geostationary orbits (launched by GSLVs), whereas PSLV satellites move relative to the Earth's surface in polar orbits. The core concept being tested is the functional classification, orbital mechanics, and technical specifications of ISRO’s launch vehicle family.