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: Medicine
A patient develops sudden palpitation with HR 150/ min, regular. What could be the cause 
Select and explain. 
A. PSVT, B. Sinus tachycardia, C. Ventricular tachycardia, D. Atrial flutter with block
A: PSVT
Answer: A: PSVT 
Explanation: None