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: Physiology
Adrenaline used for controlling of bleeding during surgery may result in: 
Select and explain. 
A. Syncope, B. Cardiac arrhythmias, C. Drastic fall in blood pressure, D. Precipitation of allergic reaction
B: Cardiac arrhythmias
Answer: B: Cardiac arrhythmias 
Explanation: None