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
In case of surgery indicated dose of LA should be: 
Select and explain. 
A. 1:80, 000, B. 1:1,00,000., C. 1: 50,000., D. 1:2,00,000
C: 1: 50,000.
Answer: C: 1: 50,000. 
Explanation: High dose of epinephrine is required to control bleeding.