Radiology In a child of one month age with history of nonbilious vomiting and no weight gain with palpable epigastric lump, first investigation to be done is A Barium study B Ultrasonography C Endoscopy D CT scan 💡 Explanation In a child of one month age with history of nonbilious vomiting and no weight gain with palpable epigastric lump, first investigation to be done is ✓ Correct Answer: B. Ultrasonography