<prompt> A normal-anion-gap metabolic acidosis occurs in patients with-DiarrhoeaDiabetic ketoacidosisMethyl alcohol poisoningAcute renal failure  <response>: Alkali can be lost from the gastrointestinal tract from diarrhea or from the kidneys renal tubular acidosis, A. In these disorders, reciprocal changes in and result in a normal anion gap AG. In pure non-AG acidosis, therefore, the increase in above the normal value approximates the decrease in . 