The question asks for the kingdoms associated with the life of Buddha.
Option-1 adds Kingdom `Avanti` with Gandhara and Kosala, but Avanti was not associated with Buddha`s life.
Option-2 includes Gandhara and Magadha. However, Buddha didn`t have any significant interactions or events related to Gandhara region.
Option-3 is the correct answer, it suggests Kosala and Magadha. Kosala is where Buddha had his major discourses. Magadha`s king Bimbisara was a follower of Buddha.
Option-4 includes Avanti, Kosala and Magadha, but as explained earlier, Avanti was not a significant part of Buddha`s life.