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
The most common rhythm disturbance during early postoperative period is: 
Select and explain. 
A. Bradycardia, B. Ventricular fibrillation, C. Tachycardia, D. Complete hea block
C: Tachycardia
Answer: C: Tachycardia 
Explanation: C i.e. Tachycardia Sinus tachycardia is most commonly occurring arrhythmia in the perioperative period.