Which one of the following statements about ancient Indian Mahajanapadas is correct?
- Buddhist and Jaina texts list sixteen Mahajanapadas.
- All Mahajanapadas were located in Eastern India.
- All Mahajanapadas were oligarchies where power was exercised by a group of people.
- No army was maintained by the Mahajanapadas.
Buddhist text 'Anguttara Nikaya' and Jaina text 'Bhagavati Sutra' provide list of 16 Mahajanapadas. Mahajanapadas were of two types: Monarchial states ruled by kings and Republics ruled by a group of people.
The correct option is A.