This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'How does wilms tumor commonly present in children \nSelect and explain. \nA. Hematuria, B. Abdominal pain, C. Abdominas mass, D. Fever', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Asymptomatic abdominal mass is the most common presentation of wilms tumor.', 'role': 'assistant'}]