The correct option is B Ujjain
During the 6th Century BCE 16 kingdoms and republics flourished in the ancient Indian subcontinent. These 16 city states are known as Mahajanapadas. These were Anga, Asmaka, Avanti, Chedi, Gandhara, Kashi, Kamboja, Kosala, Kuru, Magadha, Malla, Machha, Panchala, Surasena, Vriji, and Vatsa. Avanti kingdom was in the territory of present Madhya Pradesh state. Ujjain was the capital of Avanti.