The correct option is C An "inferior" person could not marry a "superior" person.
The separation of people was done on the basis of their work and superior people never used to touch inferior people only in the case of untouchability, whereas separation on the basis of someone's race was only there in the case of apartheid. An "inferior" person could not marry a "superior" person. If this was done, the couple doing so would be subjected to harsh punishments.