Dear Sekhon ji,
Anyone who understands Sikhi would not have asked this question, as this is just against the tenets of sikhi, which abolishes such divisions.
Maanas ki jaat sabey eke pehchanbo.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/sikh-youth/14462-caste-system-in-sikhism.html
Regards, Arvind.