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
Which of the following arrhythmias is most likely to be heritable? 
Select and explain. 
A. Sho Q-T syndrome, B. Long Q-T syndrome, C. Ventricular ectopic, D. WPW Syndrome
B: Long Q-T syndrome
Answer: B: Long Q-T syndrome 
Explanation: Long Q-T syndrome. The genetic basis of heritable arrhythmias, most notably the long Q-T syndromes, has been linked to mutations of genes coding for subunits of cardiac potassium and sodium channeis.