This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Pediatrics
[{'content': "Wilm's tumour commonly presents as \nSelect and explain. \nA. Pain in the abdomen, B. Abdominal mass, C. Fever, D. Hematuria", 'role': 'user'}, {'content': "Answer: B \nExplanation: (Abdominal mass): Ref: 574-G (592-Ghai 7th)WILM'S TUMOR or nephroblastoma is the most common malignant tumour of the kidney* 80% of children under the 5 years (mean age 3years/* Congenital anomalies particularly -- Aniridia- Hemihypertrophy- Beckweith - Wiedmann syndrome- Mental retardation* Deletion in the region of 11 p 13Clinical Presentation* Most of the patients presents with a asymptomatic abdominal mass* Hematuria (10- 25%) Hypertension (about 25%)* Other frequent symptoms - abdominal pain (30%) fever (20%) anorexia and vomiting* Ultrasound scanning is the most important investigation", 'role': 'assistant'}]