1721: The following maps shows four of the sixteen mahajanapadas that existed in ancient India :
The places marked A, B, C and D respectively are
(a) Matsya, Cedi, Kosala, Anga
(b) Surasena, Avanti, Vatsa, Magadha
(c) Matsya, Avanti, Vatsa, Anga
(d) Surasena, Cedi, Kosala, Magadha