This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: ECG and Arrhythmia 3, Subject name: Medicine
Most common sustained tachycardia in healthy young women is? 
Select and explain. 
A. AVN, B. AV, C. Atrial fibrillation, D. Pre-excitation syndrome
A: AVN
Answer: A: AVN 
Explanation: Most common sustained tachycardia in healthy young women is: AVN/PSVT Option B: AV (Atrioventricular Reentrant Tachycardia) seen with pre excitation syndrome like WPW syndrome where there is abnormal conduction pathway in the hea.