Hi aspirant,

If you belong to SEBC then you have to select OBC-NCL in CAT form because SEBC comes under OBC-NCL if your family income is less than 6 lakhs then select OBC-NCL.

EWS certificate is for general category whose income is less than 8 lakhs.

But for both OBC-NCL and EWS you need to have valid documents.

So I would suggest you to select category if you have valid documents of one of the category.

Hope this helps you..