Option (d) is correct regarding ancient Indian Mahajanapadas.Buddhist literature (Anguttara Nikaya, Mahavastu) and Jainliterature (Bhagavati Sutta) present a list of 16 Mahajanapads withminor variation in names. In the post-Vedic period, the entirenorthern territory mostly situated north of the Vindhyas and extending from the North-West frontier to Bihar was divided intosixteen states called Sodasha Mahajanapadas. These Mahajanapadas were either monarchical or republican incharacter