<prompt> Normal anion gap is seen in:Diabetic ketoacidosisLactic acidosisStarvation ketoacidosisRenal tubular acidosis  <response>: Ans. d Renal tubular acidosis Anion gap :The anion gap is the difference between primary measured cations sodium Na and potassium K and the primary measured anions chloride Cl and bicarbonate HCO3 in serum. So we take value of sodium and from it subtract the value of chloride and bicarbonate. Value of Normal anion gap 10 to 12 mmolLAG calculated as follows: AG Na - Cl HCO3Normal anion gapMn: FUSED CARIncreased anion gapMn: MUDPILESDecreased anion gapMn: BPH-MF- Fistula pancreaticM - MethanolBromide intoxicationU- UreterosigmoidostomyU - UremiaPlasma cell dyscrasiaS- Small bowel fistulaD - DKA AKA SKA diabeticalcoholic starvationHypoalbuminemiaE- Extra chlorideP - Paraldehyde phenforminMonoclonal proteinD- Diarrhea1 - Iron INH C- Carbonic anhydraseInhibitor acetazolamideL - Lactic acidosis A- Adrenal insufficiencyR- Renal tubular acidosisE - Ethylene glycol S - Salicylates 