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: Physiology
Normal anion gap is (in mEq/L) ? 
Select and explain. 
A. 5-Mar, B. 12-Oct, C. 18-20, D. 25-30
B: 12-Oct
Answer: B: 12-Oct 
Explanation: Ans. is `b' i.e., 10-12