<prompt> Normal anion gap metabolic acidosis is seen in:DiarrhoeaRenal failureLactic acidosisDiabetic ketoacidosis  <response>: Law of electroneutrality Number of cations anions should be equal in ICF and ECF In ECF, Na is main cation, Cl- HCO3- are main anions. We do not measure all cations anions, it is measured as we can measure all cations but we cannot measure all anions. So, there is a gap created bw these two sides. This is called Anion gap. Anion gap is calculated as - 141 - 141 - 129 12meqlit -4K Thus, normal anion gap is 12- 4 meqlit. In acidosis conditions; HCO3- decreases thus anion gap increases except in acidosis conditions in which anion of the acid is Cl- where anion gap will remain normal. In G.I fluid loss, anion gap remains normal. 