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: Physiology
Centre of activity of autonomic nervous system is: 
Select and explain. 
A. Midbrain, B. Cerebrum, C. Hypothalamus, D. Pons
C: Hypothalamus
Answer: C: Hypothalamus 
Explanation: None