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: Surgery
Action of toxic doses of Local anesthesia on CNS
can be described as 
Select and explain. 
A. first stimulating the CNS followed by depression, B. first depressing it followed by CNS stimulation, C. only depression of the CNS, D. only stimulation of the CNS
A: first stimulating the CNS followed by depression
Answer: A: first stimulating the CNS followed by depression 
Explanation: None