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': 'Regarding congenital hypertrophic pyloric stenosis true statement is: \nSelect and explain. \nA. On feeding an olive mass palpated in epigastric region, B. On nonfeeding a mass is palpated in right upper quadrant, C. Mass is felt in umbilical region, D. A palpable mass is seen in right iliac fossa', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. (b) On non feeding a mass is palpated in right upper quadrantRef: Bailey and Love 27th Edition, Page 128Congenital Hypertrophic Pyloric Stenosis* Diagnosed by clinical finding* During a test feed a visible gastric peristalsis is seen passing from left to right across upper abdomen.* In a relaxed baby (nonfeeding): Pyloric tumor is palpated as an Olive-shaped mass in right upper quadrant (Author's Note: As I Have already told a direct line from Bailey by NBE examiners)* Diagnosis is confirmed by USG.", 'role': 'assistant'}]