Which of the following statements is not correct?
1
The domain of the Austro-Asiatic family of languages lies in the north-eastern part of India.
2
The ancient hunters and food gathers organized themselves in groups based on extended kinship principle.
3
Social historians are in general agreement that caste system began in the vedic period.
4
Castes are often classified into three main groups, such as functional or occupational, racial or ethnic and sectarian.