All of the following are neurologic channelopathies except:
A. Hypokalemic periodic paralysis
B. Episodic ataxia type 1
C. Familial hemiplegic migraine
D. Spinocerebellar ataxia 1
Correct answer : D. Spinocerebellar ataxia 1
Spinocerebellar ataxia (SCA) type 1 is not a neurological channelopathy. But SCA type 6 is a neurological channelopathy.