This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: AIIMS 2017, Subject name: Medicine
Normal anion gap metabolic acidosis seen in all except? 
Select and explain. 
A. Proximal A, B. Severe pancreatitis, C. Diarrhea, D. Salicylates poisoning
D: Salicylates poisoning
Answer: D: Salicylates poisoning 
Explanation: Classification of Anion GAP: High anion gap M.A Normal Anion gap M.A High Mud FLES Normal USed CARP Methanol Uremia DKA Paraldehyde IEM, Iron, INH Lactic acidosis Ethanol, athylene glycol Salicylate Ureterostomy Small bowel fistula Extra chloride Diarrhea Carb anhydrase inhibitor Adrenal insufficiency RTA Pancreatic Fistula