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 are features of hypernatremia, except - 
Select and explain. 
A. Convulsion, B. Elevated intracranial tension, C. Periodic paralysis, D. Muscle twitching
C: Periodic paralysis
Answer: C: Periodic paralysis 
Explanation: None