This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Surgery
Earliest symptom of Wilms tumour is 
Select and explain. 
A. Hematuria, B. Pyrexia, C. Abdominal mass, D. Metastases
C: Abdominal mass
Answer: C: Abdominal mass 
Explanation: Nephroblastoma Usually presents in the first five years of life ,Typically presents with an abdominal mass , May cause haematuria, abdominal pain or fever Metastasises to the lung . tretment is usually chemotherapy followed by nephrectomy . Eighty per cent survive long term with modern chemotherapy and surgery. The prognosis is worse in those with metastases and in older children ref : Bailey and Love 27th ed , chapter 76 , pg no :- 1421