Read the following statement with reference to the 6th century to 4th century BC
1.The Mahajanapadas bear the names of the dominant Kshatriya lineage in most cases.
2.People in the 6th century BC did not know use of iron.
3.By the 6th century BC a class of free peasants and merchants had emerged.
4.Private property in the form of animals, land and its produce had emerged by the 6th century BC
Which of the statement(s) given above is/are correct?