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: Psychiatry
Most common cause of death in Rett's syndrome is 
Select and explain. 
A. Hypoglycemia, B. Cardiac arrhythmias, C. Seizures, D. Respiratory failure
B: Cardiac arrhythmias
Answer: B: Cardiac arrhythmias 
Explanation: Cardiac arrythmia is the leading cause of death in Rett's syndrome.