This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Stomach & Duodenum, Subject name: Surgery
[{'content': 'Clinical features of pyloric stenosis in infants are all except: \nSelect and explain. \nA. Abdominal lump, B. Constipation, C. Weight loss, D. Metabolic acidosis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) Metabolic acidosisRef: Sabiston 20th Edition, Page 1869* Weight loss can occur on longstanding cases* Constipation may occur due to persistent vomiting.', 'role': 'assistant'}]