Hi,
For NCC 'C' Certificate, one must be acquiring minimum 50% in graduation. Even the students applying im last year of graduation should also keep in mind that their % in all three years remain at least 59% so that they may get an aggregate of at least 50%.

The minimum aggregate percentage for the candidate is 50 percent , that means in your years of graduation you should have scored at least 50 percent , then only you are eligible for the entry , but I would suggest you not to be at the edge of the percentage rather focus on your studies too and make sure you have a decent percentage .
All the best