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: Anaesthesia
Dose of thiopentone used is 
Select and explain. 
A. 2%, B. 2.50%, C. 3%, D. 5%
B: 2.50%
Answer: B: 2.50% 
Explanation: 2.50%