With reference to jatis and social mobility, consider the following statements:
1. Jatis were rigid categories and fixed in number like the four varnas.
2. Jatis often emerged when new occupational groups did not fit neatly into the fourfold varna system.
3. Some jatis functioned as guilds or shrenis, sharing a craft and economic activity.
4. Inscriptions provide rare but valuable evidence about mobility among jatis.