You have the option of selecting one of the following categories:

Farmers/FPOs: If you are a farmer, a member of a farmers' cooperative, or a member of a Farmers Producers. Organization, this section is for you (FPOs).
Participants in the value chain (VCPs): Processors, commercial users such as Dal and Flour Millers, Importers, Exporters, Physical Market Traders., Stock Cash & Carry participants, Produces, SME/MSME & Wholesalers, and others who are not farmers/FPOs.

Others: If you want to trade on the MCX but don't fit into any of the aforementioned categories.