hi, in their eligibility criteria it is written that you need to have 50% overall in 12th board. So, you are good to go. Your NATA score is decent enough to get you into MEASI. NATA marks from 200 total will be converted into 100 marks and your 12th marks will be added to it. This is your final merit score. If it is above 130 you will get very good private colleges anything less will be difficult to get into good colleges. You have an option of applying for management seats. It is recommended that you apply to other colleges as well to optimize and get the best fit for yourself. If you still have doubts feel free to comment. Hope this helps.