Yes, you can apply under the EWS category if your caste is not listed in the OBC category of either the central or state list. Since you will be considered as a General category candidate in such cases, you are eligible for EWS provided your family’s annual income is below 8 lakh and you do not fall under SC, ST, or OBC reservations. You will need to get a valid EWS certificate from the competent authority to claim the benefit.