This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Benign Gastric Disease, Subject name: Surgery
[{'content': 'Which is Not true regarding Hypertrophic pyloric stenosis: \nSelect and explain. \nA. Ultrasound is not useful for diagnosis, B. Usually presents between 2-8 weeks, C. Common in males, D. Dilated stomach with minimal gas', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' ie. U/S is not useful for diagnosis Option A is absolutely wrong statement as U/S is the inv. of choice for hypertrophic pyloric stenosis.Already explained in June, 2000.", 'role': 'assistant'}]