Correct Answer: (c) Matsya, Avanti, Vatsa, Anga
Note: Options A, B, C, D show Matsya, Avanti, Vatsa and Anga Mahajanapada respectively. Matsya Mahajanapada was located in the Jaipur, Alwar and Bharatpur districts of Rajasthan. Viratnagar was its capital. Avanti Mahajanapada was located in the west and central region of Malwa. It had two parts-Northern Avanti (capital-Ujjayini) and Southern Avanti (capital-Mahishmati). Modern Prayagraj and Kaushambi districts constituted Vatsa Mahajanapada in ancient times. Its capital was Kaushambi. Modern Bhagalpur and Munger districts of Bihar were under the Anga Mahajanapada. Its capital was Champa.