Yes, you can. Engineering services as well as SSC specify specific conditions. But, it is stated in their announcement that the requirements may be relaxed for outstanding candidates. It’s not unusual for engineering services since their primary concern is your performance during the entrance test and interview. It is impossible to do for SSC as well. Furthermore, I think that you need to think about these issues later. The first step is to show up at the test and do your best. If you truly desire something, there’s always a way to get there. Even if you face issues later on, I’ll endeavor to help you through the situation because I personally believe that having a job that you like is essential to live a happy life.