Explanation:

The correct option is (b) Supercomputer. SAGA-220 stands for 'Supercomputer for Aerospace with GPU Architecture - 220 TeraFLOPS'. It was developed by the Indian Space Research Organisation (ISRO) in 2011 for complex aerospace simulations and computations, demonstrating ISRO's advanced computing capabilities. Option (a) Missile is incorrect; while ISRO is involved in rocketry, SAGA-220 is a computing system. Option (c) Satellite is also incorrect; ISRO launches satellites, but SAGA-220 itself is not a satellite. Option (d) Pacemaker is a medical device and completely unrelated to ISRO's projects.