This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neoplasms of the Kidney, Subject name: Pediatrics
[{'content': 'Wilms tumor - most common presenting symptom- \nSelect and explain. \nA. Haematuria, B. Asymptomatic abdominal mass, C. Abdominal pain, D. Headache', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Asymptomatic abdominal massWilm's tumor (Nephroblastoma)Most common malignant tumor of kidney, 80% of tumor present below 5 year of age.PresentationAsymptomatic abdominal mass (M. C.).Haematuria (10-25%).Hypertension (25%).Abdominal pain (30%).Fever (20%).", 'role': 'assistant'}]