Since the Jat community is not included in the Central List of OBCs and Delhi University considers that list for admissions, you shouldn't choose OBC in the CSAS portal.

This is the most accurate option since Jats are not on the Central OBC list for Delhi University admissions

If your family income falls under the EWS criteria (gross annual family income less than Rs. 8 lakh), you can choose EWS during the CSAS portal selection. However, confirm the EWS eligibility criteria from the official DU website or CSAS portal to ensure you meet the income requirements.