Explanation:
Avanti and Gandhara were not associated with life of Buddha, while Magadha and Kosala were.
Shortly after the birth of his son, Buddha left Kapilavatthu at the age of twenty-nine and headed for Magadha in search of spiritual truth.
Anathapindika was noted for his great generosity and a few years after Buddha’s return to Kosala, he paid a huge amount of gold to buy a park in Savatthi. The Kosala King Pasenadi first met the Gotama Buddha at Jeta’s Grove, when the Buddha was about forty years old. The Buddha greatly impressed the King, and subsequently Pasenadi also became one of his patrons and followers.