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: Pediatrics
Most common presentation of wilm's tumor ? 
Select and explain. 
A. Hematuria, B. Asymptomatic abdominal mass, C. Abdominal pain, D. Headache
B: Asymptomatic abdominal mass
Answer: B: Asymptomatic abdominal mass 
Explanation: Ans. is `b' i.e., Asymptomatic abdominal mass Wilm's tumor (Nephroblastoma) Most common malignant tumor of kidney. 80% of tumor present below 5 year of age. Presention :? Asymptomatic abdominal mass (M.C.). Haematuria (10-25%). Hypeension (25%). Abdominal pain (30%). Fever (20%).