<prompt> Metabolic abnormality seen in congenital hyperophic pyloric stenosis isHypochloremic hypokalemic metabolic alkalosisHyperchlonemic hypokalemic metabolic alkalosisHypochloremic hypokalemic metabolic acidosisHyperchoremic hypokalemic metabolic acidosis  <response>: To control alkalosis, kidney secretes excess bicarbonate. Due to hyponatremia, body conserves sodium and so bicarbonate is secreted along with the hydrogen in. Urine becomes acidic and called as paradoxical aciduria Reference: SRB edition: 5th page no:830 