The institution responsible for medical education and research in Tamil Nadu is:

The Directorate of Medical Education
Indian Council of Medical Research (ICMR)
All India Institute of Medical Sciences (AIIMS)
Medical Council of India (MCI)

The correct answer is: The Directorate of Medical Education.

The Directorate of Medical Education (DME) is the nodal agency for medical education and research in Tamil Nadu. It is responsible for the planning, implementation, and monitoring of medical education in the state. The DME also regulates medical colleges and hospitals in Tamil Nadu.

The Indian Council of Medical Research (ICMR) is a national research body that is responsible for the promotion of medical research in India. The ICMR does not have any direct role in medical education in Tamil Nadu.

The All India Institute of Medical Sciences (AIIMS) is a premier medical institute in India. It is located in New Delhi. AIIMS does not have any direct role in medical education in Tamil Nadu.

The Medical Council of India (MCI) is a statutory body that is responsible for the regulation of medical education in India. The MCI does not have any direct role in medical education in Tamil Nadu.

The DME is a government body that is responsible for medical education and research in Tamil Nadu. It is responsible for the planning, implementation, and monitoring of medical education in the state. The DME also regulates medical colleges and hospitals in Tamil Nadu. The ICMR is a national research body that is responsible for the promotion of medical research in India. The ICMR does not have any direct role in medical education in Tamil Nadu. The AIIMS is a premier medical institute in India. It is located in New Delhi. AIIMS does not have any direct role in medical education in Tamil Nadu. The MCI is a statutory body that is responsible for the regulation of medical education in India. The MCI does not have any direct role in medical education in Tamil Nadu.