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
Normal anion gap metabolic acidosis is caused by - 
Select and explain. 
A. Cholera, B. Starvation, C. Ethlene glycol poisoning, D. Lactic acidosis
A: Cholera
Answer: A: Cholera 
Explanation: None