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
Which among the following electrolyte disturbance following diarrhoea can cause convulsions? 
Select and explain. 
A. Hypokalemia, B. Hyponatremia, C. Hyperkalemia, D. Hypernatremia
B: Hyponatremia
Answer: B: Hyponatremia 
Explanation: Hyponatremia can result from diarrhea, vomiting, burns, diuretic administration, and administration of sodium-poor parenteral solutions. Seizures and coma usually are associated with severe hyponatremia and may be life-threatening. Acute hypernatremia usually is caused by severe water depletion with diarrhea especially in children. Ref: Harrison's 17th edition, chapter 46