Which Indian satellite was the first to be placed in geostationary orbit by an indigenous launch vehicle?

APPLE (Ariane Passenger Payload Experiment) was India's first experimental geostationary communication satellite, launched in 1981 aboard an Ariane rocket. However, the first indigenous launch to GEO was INSAT-2A via ASLV/GSLV trials; strictly speaking, Rohini RS-1 (1980) was first indigenous orbital success but in LEO. For GEO specifically via Indian vehicle, later missions achieved this. Note: APPLE was foreign-launched; Rohini was LEO. This question tests nuanced understanding.