Hi

The division of categories i. e general, obc, sc, st is on the basis of caste .

So, first of all is your caste there in the list of OBC?
You can check it at the official website of the state you belong to, while  at Central level you can know that whether you belong to  OBC or not by visiting the official website to ncbc the direct link for which is provided below

Central list :
http://www.ncbc.nic.in/User_Panel/CentralListStateView.aspx

So, if your cast is in the list of OBC then you belong to OBC category.

Now,
The OBC category is further divided into 2 categories  on the basis of income or economic status :-

• OBC NCL i. e OBC non creamy layer :- if the family income is less than  8 lakh per annum.
• OBC CL i. e OBC creamy layer :-  if the family income is more than 8 lakh per annum

So,
If your caste belongs to OBC category then on income basis you  will fall under OBC NCL as your family income is 3.5 lacs per annum i. e less than 8 lacs per annum

Thankyou