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
Increased anion gap is seen in: 
Select and explain. 
A. Enterocutaneous fistula, B. Illeostomy fistula, C. Lactic acidosis, D. All
C: Lactic acidosis
Answer: C: Lactic acidosis 
Explanation: C i.e. Lactic acidosis