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
Which of the following is the most common inherited malignancy : 
Select and explain. 
A. Infant leukemia, B. Retinoblastoma, C. Wilm's tumour, D. Neuroblastoma
B: Retinoblastoma
Answer: B: Retinoblastoma 
Explanation: "Retinoblastoma is the most strking example of inhirited cancer syndrome. Approximately 40% of retinoblastomas are familial. Carrier of this gene have a 10000 fold increased risk of developing retinoblastoma usualy bilateral".


Each child of parent with familial bilateral retinoblastoam has a 50% risk of inheriting the retinoblastoma gene, of these 90% will develop retinoblastoma.