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
Excess of plasma level of lignocaine can cause cardiovascular collapse due to: 
Select and explain. 
A. Myocardial depression, B. Vagal stimulation, C. Syncope, D. CN5 excitability
A: Myocardial depression
Answer: A: Myocardial depression 
Explanation: None