GSAT-10 was indeed launched from French Guiana on September 29, 2012. It weighed approximately 3400 kg at launch. It carried 30 transponders (12 Ku-band, 12 C-band, and 6 extended C-band), not 25, further making option C potentially inaccurate depending on how 'communication transponders' is interpreted, but option D is definitively incorrect regarding the lifespan.