What are the 3 stages of GSLV?

The upper stage is the cryogenic stage. There is 1 liquid core stage. GSLV has three solid strap on boosters which is the initial stage. These are the 3 stages of GSLV. You can read about the GSLV Mk III – A Comprehensive Overview of Heavy Lift Launch Vehicle in the given link.

Further readings:

1. Chandrayaan 2 Mission
2. Mars Orbiter Mission (MOM) – Objectives, Payloads