<prompt> Anion gap increased in all exceptSalicylate toxicityRenal failureLactic acidosisDiarrhoea  <response>: Ans. d Diarrhoea. Refer to Q.No.4 of the same section of same paperAnion gap: represent unmeasured anions in plasmaXCauses of increased anion gap metabolic acidosis Ketoacidosis DM, starvation, acidosis Lactic acidosis Methanol, ethylene glycol, Salicylate toxicity Renal failureAG Na K - Cl HCO3; Normal AG 10-12 mmolL. AI2005 The unmeasured anions include anionic proteins, phosphates, sulphates and organic anions. An increased anion gap is often due to increase in unmeasured cations Ca, Mg, K 