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
All os the following are calcium channelopathies, except - 
Select and explain. 
A. Episodic ataxia -1, B. Spinocerebellar ataxia -6, C. Familial hemiplegic migraine, D. Hypokalemic periodic paralysis
A: Episodic ataxia -1
Answer: A: Episodic ataxia -1 
Explanation: None