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 LA on CNS can be described as: 
Select and explain. 
A. Depression of the CNS, B. Stimulation of the CNS, C. First stimulating the CNS followed by depression., D. First depression it followed by CNS stimulation.
C: First stimulating the CNS followed by depression.
Answer: C: First stimulating the CNS followed by depression. 
Explanation: None