This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Which of the following is given to treat thrombocytopenia secondary to anti cancer therapy and is known to stimulate progressive megakaryocytes 
Select and explain. 
A. Filgrastin, B. Oprelvekin, C. Erythropoietin, D. Iron dextran
B: Oprelvekin
Answer: B: Oprelvekin 
Explanation: Refer Katzung 11/e p 580 Oprelvekin (1L-11) is used to prevent and treat thromcytopenia