To determine your specific OBC category (such as 2A, 2B, 3A), you need to follow these steps:

1. Check State Government Classification: OBC sub-categories like 2A, 2B, 3A, and 3B are specific to certain states in India. Each state has its own classification and criteria for categorizing OBCs.

2. Consult Your Community Certificate: If you already have an OBC certificate, it may mention the specific sub-category. If it doesn't, you can visit the issuing authority (usually the Tehsil office or a similar local government office) for clarification.

3. State-Specific Lists: States often have lists of castes and communities that fall under each OBC sub-category. You can find these lists on the official websites of your state's social welfare or backward classes department.

4. Enquire at Local Authorities: You can visit the local office where OBC certificates are issued (such as the Tehsil office) and inquire about your sub-category. They can provide the necessary details based on your caste/community.