<prompt> Antral obstruction with vomiting is NOT characterised by:HypokalemiaHypochloremiaAcidosisHyponatremia  <response>: Repeated vomiting leads to hypochloremic, hypokalemic metabolic alkalosis. Acidosis is not seen. Ref: Schwaz 9e, Page 1426; Nelson 17e, Page 1229. 