With reference to the socially and educationally backward classes (SEBCs) in India, consider the following statements:
1. States can prepare their own list of socially and educationally backward classes.
2. The list of socially and educationally backward classes prepared by the states cannot differ from the Central list.
3. Only the Parliament may notify the Central list of socially and educationally backward classes.
4. Union Territories must consult the National Commission for Backward Classes while preparing their list of socially and educationally backward classes.
How many of the above statements are correct?