India

Hello Arunachal,
Tamil Nadu state board is one of the most competitive exam where it is necessary to score a good cut off to get a seat into Anna University.
The difficulty is not that much as compared to any entrance exam as the question will be mostly revolving around those in the book exercises. So, you need to focus more on the concepts and the book exercises. It is also important to practice the problems especially in maths and also in physics and chemistry.
You may refer the previous year question papers which will be of immense help to you during the last days of preparation.
Don't stress too much. Just keep focusing on the concepts and problems in the book back.
All the best!

There are plenty of good jobs & higher study opportunities available after getting the degree in dentistry as a doctor. It is the professional field with 100% job placement.
A BDS graduate may go for the PG degree programmes leading to the Domain MS (Master of Dental Surgery). MS is the advanced degree in dentistry field and allows the candidates to specialize in any of its discipline. Interested candidates can also go for research programme by pursuing Doctor of Philosophy.
Teaching career is also open for BDS graduates. Those interested in teaching can acquire teaching jobs in any of the top Dental Colleges. They are eligible to hold positions as professors or even HOD and even get promoted to Dean. One can also open his/her own dental clinic or work as dentist in government and private hospitals.
This profession includes the imaging, tissue graft, implants, laser surgery and trauma. After completing this course you will be hired by the medical college, hospitals, nursing home, health corporations, health ministry, and back office medical consultancy.
Some of the best colleges in India from where you can pursue clinical research are as follows:
1) Institute of Clinical Research India
2) Apheta Institute of Clinical Research
3) Hamdard Institute of Medical Sciences and Research
4) Indian Biosciences and Research Institute
5) Sharda University - School of Medical Sciences & Research
Admission to these universities may require appearing for entrance exams conducted by the institute. Different institutes have different admission criteria. Request you to check for the same, or mention the college for which you need admission details so that I can populate information for you. Regards.