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
A 1 year old child presenting with abdominal mass and calcification on X-rays is suggestive of ? 
Select and explain. 
A. Teratoma, B. Neuroblastoma, C. Wilms tumour, D. Rhabdomyosarcoma
B: Neuroblastoma
Answer: B: Neuroblastoma 
Explanation: Ans. is 'b' i.e., Neuroblastoma o Both neuroblastoma and wilms tumor can present with abdominal mass and calcification. o But, at 1 year, it is most likely neuroblastoma. o The mean age of presentation of wilms tumor is 3 years.