This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Pediatrics
[{'content': 'In congenital pyloric stenosis, which of the following is not seen? \nSelect and explain. \nA. Weight loss, B. Projectile vomiting, C. Lump, D. Bile in vomitus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: (D) Bile in vomitus # Clinical features of Hypertrophic pyloric stenosis:> Classical presentation is of non-bilious vomiting beginning usually at 3-6 weeks age.> Vomiting gradually increases in frequency and severity to become projectile.> Gradually dehydration and failure to thrive manifest.> Persistent vomiting leads to malnutrition, dehydration & Constipation is usual.> Stomach muscles contract forcibly to overcome the obstruction.> Vigorous peristaltic waves moving from the left hypochondrium to umbilicus are visible.> Small mass due to pyloric thickening might be palpable in the transpyloric plane on the right side.', 'role': 'assistant'}]