Answer:
Hinduism
Step-by-step explanation:
Although it can be argued that all three have a caste system, the one embraced by Hinduism seems to be the one that's more well-known.
Hinduism Caste System
Brahmins (priests, teachers)
Kshatriyas (rulers, warriors)
Vaishyas (landowners, merchants)
Sudras (servants)
Dalits (the untouchables)