<prompt> Congenital hyperophic pyloric stenosis associated withHypokalemic acidosisHypokalemic alkalosisHyperkalemic acidosisHyperkalemic alkalosis  <response>: Due to electrolyte changes because of vomiting, hypochloremic, hyponatremic, hypokalemic, hypocalcemic, hypomagnesemic alkalosis occurs with paradoxical aciduria. Reference: SRB 5th edition page no. 829 