Indian satellite launch vehicles

With reference to India’s satellite launch vehicle, consider the following statements:

1. PSLVs launch those 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 1 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?