The correct answer is option 1, Koraput. MIG engines are assembled in Koraput. It is important to note that MIG is a type of fighter aircraft commonly used by various air forces around the world. The assembly of MIG engines is a meticulous process that requires skilled technicians and engineers. While the other options mentioned (Nasik, Bangalore, and Ozar) are also involved in the production and maintenance of aircraft and engines, the specific assembly of MIG engines takes place in Koraput. It is worth mentioning that each option listed may have its own significance and involvement in the aviation industry, but in the context of this question, the correct answer is Koraput.