This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
Who is the principal advisor to the Union government in both medical and public health matter? 
Select and explain. 
A. The central council of Health & Family welfare, B. Medical council of India, C. The Directorate General Health & Family Welfare, D. Union Ministry of Health & Family Welfare
C: The Directorate General Health & Family Welfare
Answer: C: The Directorate General Health & Family Welfare 
Explanation: None