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
Which of  the following has strongest association with osteosarcoma? 
Select and explain. 
A. Wilms tumor, B. Retinoblastoma, C. Rhabdomyosarcoma, D. Ewings tumor
B: Retinoblastoma
Answer: B: Retinoblastoma 
Explanation: Retinoblastoma and osteosarcoma both can occur due to mutation in common gene i.e RB gene. Hence both have strongest association.