This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
Which one of the following will complicate as hyperchloremic acidosis 
Select and explain. 
A. Vomiting, B. Ureterosigmoidostomy, C. Ileoplasty, D. Diarrhoea
B: Ureterosigmoidostomy
Answer: B: Ureterosigmoidostomy 
Explanation: The biochemical changes associated with urinary diversion are due to a combination of reabsorption of chloride and urea and progressively diminishing tubular function due to pyelonephritis . diarrhoea with loss of potassium containing mucous may exacerbate the loss of potassium ( so more contribution is by ureterosigmoid diversion than by diarrhoea)