ISRO has successfully launched communication GSAT-6 satellite by using which rocket vehicle, recently?

The Indian Space Research Organisation (ISRO) has successfully launched India‚Äôs communication satellite GSAT-6 using its heavy rocket Geosynchronous Satellite Launch Vehicle (GSLV-D6) from Satish Dhawan Space Centre, Sriharikota. The ekey points about GSAT-6 are as follows- a) It will provide communication through five spot beams in S-band and a national beam in C-band for strategic users. b) The S-Band Unfurlable Antenna of six metre diameter is one of the advanced features of GSAT-6 satellite. c) Spot beams exploit the frequency reuse scheme to increase frequency spectrum utilisation efficiency. d) Satellite’s life expectancy : 9 years.