This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fluid & Electrolyte, Subject name: Medicine
A convulsion during diarrhea is because of? 
Select and explain. 
A. Hypokalemia, B. Hyponatremia, C. Hyperkalemia, D. Hypernatremia
B: Hyponatremia
Answer: B: Hyponatremia 
Explanation: ANSWER: (B) HyponatremiaREF: Harrison's 17th ed chapter 46"Diarrhea leads to ECF contraction and Hyponatremia which may lead to seizures"